Cell adhesion inhibitors

1. A cell adhesion inhibitor having Formula (I)

A—B  (I),

wherein A comprises a VLA-4 specificity determinant which does not impart significant IIb/IIIa activity and is selected from the group consisting of alkyl; aliphatic acyl optionally substituted with N-alkyl- or N-arylamido; aroyl; heterocycloyl; aralkylcarbonyl optionally substituted with aryl; heterocycloalkylcarbonyl; alkoxycarbonyl; aralkyloxycarbonyl; cycloalkylcarbonyl optionally fused with aryl; heterocycloalkoxycarbonyl; alkylaminocarbonyl optionally substituted with bis(alkylsulfonyl)amino, alkoxycarbonylamino or alkenyl; arylaminocarbonyl optionally substituted with bis(alkylsulfonyl)amino, alkoxycarbonylamino or alkenyl; aralkylaminocarbonyl optionally substituted with bis(alkylsulfonyl)amino, alkoxycarbonylamino or alkenyl; alkylsulfonyl; aralkylsulfonyl; arylsulfonyl; cycloalkylsulfonyl optionally fused with aryl; heterocyclylsulfonyl; heterocyclylalkylsulfonyl; aralkoxycarbonyl; aryloxycarbonyl; cycloalkyloxycarbonyl; heterocyclyloxycarbonyl; heterocyclylalkoxycarbonyl; mono- or di-alkylaminocarbonyl optionally substituted with aryl; (alkyl)(aralkyl)aminocarbonyl; mono- or di-aralkylaminocarbonyl; mono- or di-arylaminocarbonyl; (aryl)(alkyl)aminocarbonyl; mono- or di-cycloalkylaminocarbonyl; heterocyclylaminocarbonyl; heterocyclylalkylaminocarbonyl; (alkyl)(heterocyclyl) aminocarbonyl; (alkyl)(heterocyclylalkyl)aminocarbonyl; (aralkyl)(heterocyclyl)aminocarbonyl; (aralkyl)(heterocyclylalkyl)aminocarbonyl; alkenoyl optionally substituted with aryl; alkenylsulfonyl optionally substituted with aryl; alkynoyl optionally substituted with aryl; alkynylsulfonyl optionally substituted with aryl; cycloalkenylcarbonyl; cycloalkenylsulfonyl; cycloalkylalkanoyl; cycloalkylalkylsulfonyl; arylaroyl; biarylsulfonyl; alkoxysulfonyl; aralkoxysulfonyl; alkylaminosulfonyl; aryloxysulfonyl; arylaminosulfonyl; N-arylurea-substituted alkanoyl; N-arylurea-substituted alkylsulfonyl; cycloalkenyl-substituted carbonyl; cycloalkenyl-substituted sulfonyl; alkenoxycarbonyl optionally substituted with aryl; alkenoxysulfonyl optionally substituted with aryl; alkynoxycarbonyl optionally substituted with aryl; alkynoxysulfonyl optionally substituted with aryl; alkenyl-aminocarbonyl optionally substituted with aryl; alkynyl-aminocarbonyl optionally substituted with aryl; alkenyl-aminosulfonyl optionally substituted with aryl; alkynyl-aminosulfonyl optionally substituted with aryl; acylamino-substituted alkanoyl; acylamino-substituted alkylsulfonyl; aminocarbonyl-substituted alkanoyl; carbamoyl-substituted alkanoyl; carbamoyl-substituted alkylsulfonyl; heterocyclylalkanoyl; heterocyclylaminosulfonyl; carboxyalkyl-substituted aralkoyl; carboxyalkyl-substituted aralkylsulfonyl; oxocarbocyclyl-fused aroyl; oxocarbocyclyl-fused arylsulfonyl; heterocyclylalkanoyl; N′,N′-alkyl, arylhydrazinocarbonyl; aryloxy-substituted alkanoyl; heterocyclylalkylsulfonyl; alkenyl; alkynyl; cycloalkyl; aryl-fused cycloalkyl; cycloalkenyl; aryl; aryl-substituted alkyl; aryl-substituted alkenyl; aryl-substituted alkynyl; cycloalkyl-substituted alkyl; cycloalkenyl-substituted cycloalkyl; biaryl; alkoxy; alkenoxy; alkynoxy; aryl-substituted alkoxy; aryl-substituted alkenoxy; aryl-substituted alkynoxy; alkylamino; alkenylamino; alkynylamino; aryl-substituted alkylamino; aryl-substituted alkenylamino; aryl-substituted alkynylamino; aryloxy; arylamino; N-alkylurea-substituted alkyl; N-arylurea-substituted alkyl; alkylcarbonylamino-substituted alkyl; aminocarbonyl-substituted alkyl; heterocyclyl; heterocyclyl-substituted alkyl; heterocyclyl-substituted amino; carboxyalkyl substituted aralkyl; oxocarbocyclyl-fused aryl; arylurea-substituted arylalkylcarbonylamino; heteroarylamido-substituted arylalkylcarbonylamino; and arylurea-substituted arylurea, and

B is of Formula IIIa

wherein

n=0-5;

W is selected from the group consisting of CO 2 H, SO 3 H, PO 4 H 2 , tetrazole, and hydrogen; each of R 1 and R 2 , independently, is selected from the group consisting of hydrogen; alkyl; alkenyl; alkynyl; cycloalkyl; cycloalkenyl; aryl; aralkyl; heterocycle; and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide;

R 7 is selected from the group consisting of hydrogen, aryl; aralkyl, alkenyl; and alkyl optionally substituted with heterocycle, thioalkoxy, carboxy, alkoxycarbonyl,alkoxy, or halogen; and

R 10 is selected from the group consisting of R 2 , NHSO 2 R 11 , NH 2 , OR 2 , and NHZR 12 , where R 11 is selected from the group consisting of alkenyl; alkynyl; cycloalkyl; cycloalkenyl; aryl; aralkyl; heterocycle; and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide; R 12 is selected from the group consisting of hydrogen; cycloalkenyl; aryl; aralkyl; heterocycle; and alkyl optionally substituted with cycloalkyl, heterocycle, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, carboxamide, or aralkoxy; and Z is CO or (CR 1 R 2 ) n ;

provided that R 2 and R 7 or R 2 and R 10 may be taken together to form —(CH 2 ) m —, where m=1-4.

2. A cell adhesion inhibitor of claim 1 selected from the group consisting of the compounds:

3-(3,4-dimethoxyphenyl)-3-(4-methyl-(2-(4-(benzoylamino)phenylcarbamoyl)methyl)pentanoylamino)propionic acid;

3-(3,4-dimethoxyphenyl)-3-(4-methyl-(2-(4-(4-(methoxy)pyrmdin-2-yl -aminosulfonyl)phenylcarbamoyl)methyl)pentanoylalmino)propionic acid;

3-{2-[(benzyl-methyl-carbamoyl)-methyl]-4-methyl-pentanoylamino}-3-(4-methoxy-phenyl)-propionic acid;

3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-methyl}-pentanoylamino)-4-morpholin-4-yl-butyric acid;

3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-methyl}-pentanoylamino)-butyric acid methyl ester;

3-(3,4-dimethoxy-phenyl)-3-{2-methyl-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid;

3-{2-[(2-methoxy-benzylcarbamoyl)-methyl]-4-methyl-pentanoylamino}-3-(4-methoxy-phenyl)-propionic acid;

(1-{2-methanesulfonylamino-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionyl}-piperidin-2-yl)-acetic acid;

3-(4-methoxy-phenyl)-3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-methy 1 }-pentanoylamino)-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-(4-methyl-2-{[4-(3-phenyl-propyl)-phenylcarbamoyl]-methyl}-pentanoylamino)-propionic acid;

3-{2-[(4-carbamoyl-phenylcarbamoyl)-methyl]-4-methyl-pentanoylamino}-3-(3,4-dimethoxy-phenyl)-propionic acid;

3-(4-methoxy-phenyl)-3-(2-{[2-(4-methoxy-phenyl)-ethylcarbamoyl]-methyl}-4-methyl-pentanoylamino)-propionic acid;

3-{2-amino-3-[4-(3-o-tolyl-ureido)-phenylmethylcarbamoyl]-propionylamino}-3-(3,4-dimethoxy-phenyl)-propionic acid;

3-{2-amino-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-3-(3,4-dimethoxy-phenyl)-propionic acid;

3-[4-methyl-2-((4-o-tolylsulfanylmethyl-phenylcarbamoyl)methyl)-pentanoylamino]3-(3,4-dimethoxy-phenyl)-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-(4-methyl-2-{[4-(3-phenyl-propenyl)-phenylcarbamoyl]-methyl}-pentanoylamino)-propionic acid;

3-(4-methoxy-phenyl)-3-(4-methyl-2-{[4-(3-phenyl-ureido)-phenylcarbamoyl]-methyl}-pentanoylamino)-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-{2-methyl-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid methyl ester;

3-benzo[1,3]dioxol-5-yl-3-({2-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-cyclopropanecarbonyl}-amino)-propionic acid,

3-benzo[1,3]dioxol-5-yl-3-{3-[4-(3-phenyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid;

3-[2-(benzylcarbamoyl-methyl)-4-methyl-pentanoylamino]-3-(4-methoxy-phenyl)-propionic acid;

3-{2-[4-benzylsulfanylmethyl-phenylcarbamoyl)-methyl]-4-methyl-pentanoylamino}-3-(3,4-dimethoxy-phenyl)-propionic acid,

3-benzo[1,3]dioxol-5-yl-3-[3-(4-methoxy-benzylcarbamoyl)-5-methyl-hexanoylamino]-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-{4-methyl-2-[(4-o-tolyloxymethyl-phenylcarbamoyl)-methyl]-pentanoylamino}-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-(4-methyl-2-{[4-(2-o-tolylsulfanyl-methyl)-phenylcarbamoyl]-methyl}-pentanoylamino)-propionic acid;

4-morpholin-4-yl-3-{3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-butyric acid;

3-benzo[1,3]dioxol-5-yl-3-(5-methyl-3-{[4-(3-o-tolyl-ureido)-benzyl]-carbamoyl}-hexanoylamino)-propionic acid;

3-{3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-butyric acid;

3-{3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-{2-hydroxy-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-(4-methyl-2-{[4-(2-o-tolyl-ethyl)-phenylcarbamoyl]-methyl}-pentanoylamino)-propionic acid,

3-(3,4-dimethoxy-phenyl)-3-(4-methyl-2-{[4-(2-o-tolyl-vinyl)-phenylcarbamoyl]-methyl}-pentanoylamino)-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-{2-([6-(3-phenyl-ureido)-pyridin-3-ylcarbamoyl]methyl)-4-methylpentanoylamino}-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-[4-methyl-2-(4-[3-(o-tolylsulfonyl)-ureido]-phenylcarbamoyl}-methyl)-pentanoylamino]-propionic acid;

3-{3-[4-(3-phenyl-ureido)-phenylcarbamoyl]-2-methylpropionylamino}-butyric acid;

3-(3,4-dimethoxy-phenyl)-3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-methyl}-pentanoylamino)-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-{3-[3-hydroxy-4-(3-phenyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-[4-methyl-2-({4-[3-(3-methyl-pyridin-2-yl)-ureido]-phenylcarbamoyl}-methyl)-pentanoylaminol]-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-(2-methanesulfonylamino-3-{methyl-[4-(3-o-tolyl-ureido)-phenyl]-carbamoyl}-propionylamino)-propionic acid;

3-(3-{methyl-[4-(3-o-tolyl-ureido)-phenyl]-carbamoyl}-propionylamino)-butyric acid; 3-(4-methoxyphenyl)-3-(4-methyl-2-[((4-(3-o-tolyl-ureido)benzyl)carbamoyl)methyl]pentanoylamino)propionic acid;

3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylcarbamnoyl]-methyl}-pentanoylamino)-butyric acid;

3-(3,4-dimethoxy-phenyl)-3-{3-[5-(3-o-tolyl-ureido)-pyridin-2-ylcarbamoyl]-propionylamino}-propionic acid;

3-{2-methyl-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-butyric acid;

3-(3,4-dimethoxy-phenyl)-3-{2-methyl-3-[4-(3-phenyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid;

3-{2-methyl-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-hex-5-enoic acid;

3-{3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-hex-5-enoic acid;

3-benzo[1,3]dioxol-5-yl-3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-methyl}-pentanoylamino)-propionic acid;

(1-(3-(4-(3-o-tolyl-ureido)phenylcarbamoyl)propionyl)piperidin-2-yl)acetic acid;

3-(3,4-dimethoxy-phenyl)-3-(3-{methyl-[4-(3-o-tolyl-ureido)-phenyl]-carbamoyl}-propionylamino)-propionic acid,

3-(3,4-dimethoxy-phenyl)-3-{3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid,

3-(3,4-dimethoxy-phenyl)-3-{4-methyl-2-([4-(3-o-tolyl-ureido)-phenylcarbamoyl]methyl)-pentanoylamino}-propionic acid;

3-benzo[1,3]dioxol-5-yl-3-{2-methyl-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylniethylcarbamoyl]-methyl}-pentanoylamino)-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-(2-{[2-methoxy-4-(3-o-tolyl-ureido)-phenylcarbamoyl]-methyl}-4-methyl-pentanoylamino)-propionic acid; and

3-(3,4-dimethoxy-phenyl)-3-(2-{[3-methoxy-4-(3-o-fluorophenyl-ureido)-phenylcarbamoyl]-methyl}-4-methyl-pentanoylamino)-propionic acid.

3. A cell adhesion inhibitor of claim 2 selected from the group consisting of the following compounds:

3-benzo[1,3]dioxol-5-yl-3-{2-methyl-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylmethylcarbamoyl]-methyl}-pentanoylamino)-propionic acid; and

3-(3,4-dimethoxy-phenyl)-3-(2-{[3-methoxy-4-(3-o-fluorophenyl-ureido)-phenylcarbamoyl]-methyl}-4-methyl-pentanoylamino)-propionic acid.

4. A cell adhesion inhibitor of claim 2 selected from the group consisting of following compounds:

3-(3,4-dimethoxy-phenyl)-3-[4-methyl-2-({4-[3-(o-tolyl-sulfonyl)-ureido]-phenylcarbamoyl}-methyl)-pentanoylamino]-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-methyl}-pentanoylamino)-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-{3-[3-hydroxy-4-(3-phenyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid;

3-(3,4-dimethoxy-phenyl)-3-[4-methyl-2-({4-[3-(3-methyl-pyridin-2-yl)-ureido]-phenylcarbamoyl}-methyl)-pentanoylamino]-propionic acid;

3-(3-{methyl-[4-(3-o-tolyl-ureido)-phenyl]-carbamoyl}-propionylamino)-butyric acid;

3-(4-methoxyphenyl)-3-(4-methyl-2-[((4-(3-o-tolyl-ureido)benzyl)carbamoyl)methyl]pentanoylamino)propionic acid;

3-(4-methyl-2-{[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-methyl}-pentanoylamino)-butyric acid;

3-(3,4-dimethoxy-phenyl)-3-{3-[5-(3-o-tolyl-ureido)-pyridin-2-ylcarbamoyl]-propionylamino}-propionic acid;

3-{2-methyl-3-[4-(3-o-tolyl-ureido)-phenylcarbamoyl]-propionylamino}-butyric acid; and

3-(3,4-dimethoxy-phenyl)-3-{2-methyl-3-[4-(3-phenyl-ureido)-phenylcarbamoyl]-propionylamino}-propionic acid.

5. The cell adhesion inhibitor according to claim 1 , wherein A is selected from the group consisting of alkylamino; alkenylamino; alkynylanmino; aryl-substituted alkylamino; aryl-substituted alkenylamino; aryl-substituted alknylamino; arylamino; N-alkylurea-substituted alkyl; N-arylurea-substituted alkyl; arylurea-substituted arylalkylcarbonylamino; heteroarylamido-substituted arylalkylcarbonylamino; and arylurea-substituted arylurea.

6. The cell adhesion inhibitor according to claim 1 , wherein A is selected from the group consisting of alkylamino; arylamino; aryl-substituted alkylamino; heterocyclyl; and heterocyclyl-substituted amino.

7. The cell adhesion inhibitor according to claim 1 , wherein A is selected from the group consisting of aryl-substituted alkylamino; aryl-substituted alkenylamino; aryl-substituted alkynylamino; arylamino; N-alkylurea-substituted alkyl; N-arylurea-substituted alkyl; arylurea-substituted arylalkylcarbonylamino; heteroarylamido-substituted arylalkylcarbnylamino; and arylurea-substituted arylurea.

8. The cell adhesion inhibitor according to claim 1 , wherein A is (N-Ar′-urea)-para-substituted arylamino or (N-Ar′-urea)-para-substituted aralkylamino.

9. The cell adhesion inhibitor according to claim 1 wherein each of R 1 and R 2 , independently, is selected from the group consisting of hydrogen, aryl, and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide.

10. The cell adhesion inhibitor according to claim 1 wherein R 7 is selected from the group consisting of aryl, aralkyl, alkenyl, and alkyl optionally substituted with heterocycle.

11. The cell adhesion inhibitor according to claim 1 wherein R 10 is selected from the group consisting of R 2 , NHSO 2 R 11 , NH 2 , and OR 2 .

12. The cell adhesion inhibitor according to claim 1 wherein W is CO 2 H.

13. The cell adhesion inhibitor according to claim 1 wherein R 11 is selected from the group consisting of alkenyl; alkynyl; aryl; aralkyl; and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide.

14. The cell adhesion inhibitor according to claim 1 , wherein A is selected from the group consisting of alkylamino; arylamino; aryl-substituted alkylamino; heterocyclyl; and heterocyclyl-substituted amino, each of R 1 and R 2 , independently, is selected from the group consisting of hydrogen, aryl, and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide, and R 7 is selected from the group consisting of aryl, aralkyl, alkenyl, and alkyl optionally substituted with heterocycle.

15. The cell adhesion inhibitor according to claim 1 , wherein A is selected from the group consisting of alkylamino; arylamino; aryl-substituted alkylamino; heterocyclyl; and heterocyclyl-substituted amino, R 7 is selected from the group consisting of aryl, aralkyl, alkenyl, and alkyl optionally substituted with heterocycle and R 10 is selected from the group consisting of R 2 , NHSO 2 R 11 , NH 2 , and OR 2 .

16. The cell adhesion inhibitor according to claim 1 , wherein A is selected from the group consisting of alkylamino; arylamino; aryl-substituted alkylamino; heterocyclyl; and heterocyclyl-substituted amino, each of R 1 and R 2 , independently, is selected from the group consisting of hydrogen, aryl, and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide, and R 10 is selected from the group consisting of R 2 , NHSO 2 R 11 , NH 2 , and OR 2 .

17. A pharmaceutical composition comprising:

(a) the cell adhesion inhibitor of claim 1 in an amount effective for the prevention, inhibition or suppression of cell adhesion; and

(b) a pharmaceutically acceptable carrier.

18. The cell adhesion inhibitor according to claim 1 , wherein said inhibitor has an IC 50 of about 1 pM to about 10 μM, as measured by a VLA-4 direct binding assay comprising the steps of conjugating a VCAM-IgG fusion protein to a alkaline phosphatase marker enzyme, contacting the fusion protein-marker enzyme conjugate with said inhibitor and Jurkat cells, colorizing the marker enzyme conjugated to the fusion protein, and determining the amount of cell-bound fusion protein.

19. The cell adhesion inhibitor according to claim 18 , wherein said inhibitor has an IC 50 of about 1 pM to about 100 nM.

20. The cell adhesion inhibitor according to claim 19 , wherein said inhibitor has an IC 50 of about 1 pM to about 10 nM.

21. A cell adhesion inhibitor having Formula (I)

A—B  (I),

wherein A is selected from the group consisting of alkyl; aliphatic acyl optionally substituted with N-alkyl- or N-arylamido; aroyl; heterocycloyl; aralkylcarbonyl optionally substituted with aryl; heterocycloalkylcarbonyl; alkoxycarbonyl; aralkyloxycarbonyl; cycloalkylcarbonyl optionally fused with aryl; heterocycloalkoxycarbonyl; alkylaminocarbonyl optionally substituted with bis(alkylsulfonyl)amino, alkoxycarbonylamino or alkenyl; arylaminocarbonyl optionally substituted with bis(alkylsulfonyl)amino, alkoxycarbonylamino or alkenyl; aralkylaminocarbonyl optionally substituted with bis(alkylsulfonyl)amino, alkoxycarbonylamino or alkenyl; alkylsulfonyl; aralkylsulfonyl; arylsulfonyl; cycloalkylsulfonyl optionally fused with aryl; heterocyclylsulfonyl; heterocyclylalkylsulfonyl; aralkoxycarbonyl; aryloxycarbonyl; cycloalkyloxycarbonyl; heterocyclyloxycarbonyl; heterocyclylalkoxycarbonyl; mono- or di-alkylaminocarbonyl optionally substituted with aryl; (alkyl)(aralkyl)aminocarbonyl; mono- or di-aralkylaminocarbonyl; mono- or di-arylaminocarbonyl; (aryl)(alkyl)aminocarbonyl; mono- or di-cycloalkylaminocarbonyl; heterocyclylaminocarbonyl; heterocyclylalkylaminocarbonyl; (alkyl)(heterocyclyl) aminocarbonyl; (alkyl)(heterocyclylalkyl)aminocarbonyl; (aralkyl)(heterocyclyl)aminocarbonyl; (aralkyl)(heterocyclylalkyl)aminocarbonyl; alkenoyl optionally substituted with aryl; alkenylsulfonyl optionally substituted with aryl; alkynoyl optionally substituted with aryl; alkynylsulfonyl optionally substituted with aryl; cycloalkenylcarbonyl; cycloalkenylsulfonyl; cycloalkylalkanoyl; cylcoalkylalkylsulfonyl; arylaroyl; biarylsulfonyl; alkoxysulfonyl; aralkoxysulfonyl; alkylaminosulfonyl; aryloxysulfonyl; arylaminosulfonyl; N-arylurea-substituted alkanoyl; N-arylurea-substituted alkylsulfonyl; cycloalkenyl-substituted carbonyl; cycloalkenyl-substituted sulfonyl; alkenoxycarbonyl optionally substituted with aryl; alkenoxysulfonyl optionally substituted with aryl; alkynoxycarbonyl optionally substituted with aryl; alkynoxysulfonyl optionally substituted with aryl; alkenyl-aminocarbonyl optionally substituted with aryl; alkynyl-aminocarbonyl optionally substituted with aryl; alkenyl-aminosulfonyl optionally substituted with aryl; alkynyl-aminosulfonyl optionally substituted with aryl; acylamino-substituted alkanoyl; acylamino-substituted alkylsulfonyl; aminocarbonyl-substituted alkanoyl; carbamoyl-substituted alkanoyl; carbamoyl-substituted alkylsulfonyl; heterocyclylalkanoyl; heterocyclylaminosulfonyl; carboxyalkyl-substituted aralkoyl; carboxyalkyl-substituted aralkylsulfonyl; oxocarbocyclyl-fused aroyl; oxocarbocyclyl-fused arylsulfonyl; heterocyclylalkanoyl; N′,N′-alkyl, arylhydrazinocarbonyl; aryloxy-substituted alkanoyl; heterocyclylalkylsulfonyl; alkenyl; alkynyl; cycloalkyl; aryl-fused cycloalkyl, cycloalkenyl; aryl; aryl-substituted alkyl; aryl-substituted alkenyl; aryl-substituted alkynyl; cycloalkyl-substituted alkyl; cycloalkenyl-substituted cylcoalkyl; biaryl; alkoxy; alkenoxy; alkynoxy; aryl-substituted alkoxy; aryl-substituted alkenoxy; aryl-substituted alkynoxy; alkylamino; alkenylamino; alkynylamino; aryl-substituted alkylamino; aryl-substituted alkenylamino; aryl-substituted alkynylamino; aryloxy; arylamino; N-alkylurea-substituted alkyl; N-arylurea-substituted alkyl; alkylcarbonylamino-substituted alkyl; aminocarbonyl-substituted alkyl; heterocyclyl; heterocyclyl-substituted alkyl; heterocyclyl-substituted amino; carboxyalkyl substituted aralkyl; oxocarbocyclyl-fused aryl; arylurea-substituted arylalkylcarbonylamino; heteroarylamido-substituted arylalkylcarbonylamino; and arylurea-substituted arylurea, and

B is of Formula IIIa

wherein

n=0-5;

W is selected from the group consisting of CO 2 H, SO 3 H, PO 4 H 2 , tetrazole, and hydrogen;

each of R 1 and R 2 , independently, is selected from the group consisting of hydrogen; alkyl; alkenyl; alkynyl; cycloalkyl; cycloalkenyl; aryl; aralkyl; heterocycle; and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide;

R 7 is selected from the group consisting of hydrogen, aryl; aralkyl, alkenyl; and alkyl optionally substituted with heterocycle, thioalkoxy, carboxy, alkoxycarbonyl, alkoxy, or halogen; and

R 10 is selected from the group consisting of R 2 , NHSO 2 R 11 , NH 2 , OR 2 , and NHZR 12 , where R 11 is selected from the group consisting of alkenyl; alkynyl; cycloalkyl; cycloalkenyl; aryl; aralkyl; heterocycle; and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide; R 12 is selected from the group consisting of hydrogen; cycloalkenyl; aryl; aralkyl; heterocyle; and alkyl optionally substituted with cycloalkyl, heterocycle, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, carboxamide, or aralkoxy; and Z is CO or (CR 1 R 2 ) n ;

provided that R 2 and R 7 or R 2 and R 10 may be taken together to form —(CH 2 ) m —, where m=1-4; further provided that A contains at least one cyclic moiety.

22. The cell adhesion inhibitor of claim 21 , wherein A contains at least two cyclic moieties.

23. The cell adhesion inhibitor of claim 21 , wherein A contains a urea group.

24. A cell adhesion inhibitor having Formula (I)

A—B  (I),

wherein A comprises a VLA-4 specificity determinant which does not impart significant IIb/IIIa activity and is selected from the group consisting of alkyl; aliphatic acyl optionally substituted with N-alkyl- or N-arylamido; aroyl; heterocycloyl; aralkylcarbonyl optionally substituted with aryl; heterocycloalkylcarbonyl; alkoxycarbonyl; aralkyloxycarbonyl; cycloalkylcarbonyl optionally fused with aryl; heterocycloalkoxycarbonyl; alkylaminocarbonyl optionally substituted with bis(alkylsulfonyl)amino, alkoxycarbonylamino or alkenyl; arylaminocarbonyl optionally substituted with bis(alkylsulfonyl)amino, alkoxycarbonylamino or alkenyl; aralkylaminocarbonyl optionally substituted with bis(alkylsulfonyl)amino, alkoxycarbonylamino or alkenyl; alkylsulfonyl; aralkylsulfonyl; arylsulfonyl; cycloalkylsulfonyl optionally fused with aryl; heterocyclylsulfonyl; heterocyclylalkylsulfonyl; aralkoxycarbonyl; aryloxycarbonyl; cycloalkyloxycarbonyl; heterocyclyloxycarbonyl; heterocyclylalkoxycarbonyl; mono- or di-alkylaminocarbonyl optionally substituted with aryl; (alkyl)(aralkyl)aminocarbonyl; mono- or di-aralkylaminocarbonyl; mono- or di-arylaminocarbonyl; (aryl)(alkyl)aminocarbonyl; mono- or di-cycloalkylaminocarbonyl; heterocyclylaminocarbonyl; heterocyclylalkylaminocarbonyl; (alkyl)(heterocyclyl) aminocarbonyl; (alkyl)(heterocyclylalkyl)aminocarbonyl; (aralkyl)(heterocyclyl)aminocarbonyl; (aralkyl),(heterocyclylalkyl)aminocarbonyl; alkenoyl optionally substituted with aryl; alkenylsulfonyl optionally substituted with aryl; alkynoyl optionally substituted with aryl; alkynylsulfonyl optionally substituted with aryl; cycloalkenylcarbonyl; cycloalkenylsulfonyl; cycloalkylalkanoyl; cylcoalkylalkylsulfonyl; arylaroyl; biarylsulfonyl; alkoxysulfonyl; aralkoxysulfonyl; alkylaminosulfonyl; aryloxysulfonyl; arylaminosulfonyl; N-arylurea-substituted alkanoyl; N-arylurea-substituted alkylsulfonyl; cycloalkenyl-substituted carbonyl; cycloalkenyl-substituted sulfonyl; alkenoxycarbonyl optionally substituted with aryl; alkenoxysulfonyl optionally substituted with aryl; alkynoxycarbonyl optionally substituted with aryl; alkynoxysulfonyl optionally substituted with aryl; alkenyl-aminocarbonyl optionally substituted with aryl; alkynyl-aminocarbonyl optionally substituted with aryl; alkenyl-aminosulfonyl optionally substituted with aryl; alkynyl-aminosulfonyl optionally substituted with aryl; acylamino-substituted alkanoyl; acylamino-substituted alkylsulfonyl; aminocarbonyl-substituted alkanoyl; carbamoyl-substituted alkanoyl; carbamoyl-substituted alkylsulfonyl; heterocyclylalkanoyl; heterocyclylaminosulfonyl; carboxyalkyl-substituted aralkoyl; carboxyalkyl-substituted aralkylsulfonyl; oxocarbocyclyl-fused aroyl; oxocarbocyclyl-fused arylsulfonyl; heterocyclylalkanoyl; N′,N′-alkyl, arylhydrazinocarbonyl; aryloxy-substituted alkanoyl; heterocyclylalkylsulfonyl; alkenyl; alkynyl; cycloalkyl; aryl-fused cycloalkyl, cycloalkenyl; aryl; aryl-substituted alkyl; aryl-substituted alkenyl; aryl-substituted alkynyl; cycloalkyl-substituted alkyl; cycloalkenyl-substituted cylcoalkyl; biaryl; alkoxy; alkenoxy; alkynoxy; aryl-substituted alkoxy; aryl-substituted alkenoxy; aryl-substituted alkynoxy; alkylamino; alkenylamino; alkynylamino; aryl-substituted alkylamino; aryl-substituted alkenylamino; aryl-substituted alkynylamino; aryloxy; arylamino; N-alkylurea-substituted alkyl; N-arylurea-substituted alkyl; alkylcarbonylamino-substituted alkyl; aminocarbonyl-substituted alkyl; heterocyclyl; heterocyclyl-substituted alkyl; heterocyclyl-substituted amino; carboxyalkyl substituted aralkyl; oxocarbocyclyl-fused aryl; arylurea-substituted arylalkylcarbonylamino; heteroarylamido-substituted arylalkylcarbonylamino; and arylurea-substituted arylurea, and

B is of Formula IIIa

wherein

n=0-5;

W is selected from the group consisting of CO 2 H, SO 3 H, PO 4 H 2 , tetrazole, and hydrogen;

each of R 1 and R 2 , independently, is selected from the group consisting of hydrogen; alkyl; alkenyl; alkynyl; cycloalkyl; cycloalkenyl; aryl; aralkyl; heterocycle; and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide;

R 7 is selected from the group consisting of hydrogen, aryl; aralkyl, alkenyl; and alkyl optionally substituted with heterocycle, thioalkoxy, carboxy, alkoxycarbonyl,alkoxy, or halogen; and

R 10 is selected from the group consisting of R 2 , NHSO 2 R 11 , NH 2 , OR 2 , and NHZR 12 , where R 11 is selected from the group consisting of alkenyl; alkynyl; cycloalkyl; cycloalkenyl; aryl; aralkyl; heterocycle; and alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide; R 12 is selected from the group consisting of hydrogen; cycloalkenyl; aryl; aralkyl; heterocyle; and alkyl optionally substituted with cycloalkyl, heterocycle, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, carboxamide, or aralkoxy; and Z is CO or (CR 1 R 2 ) n ;

provided that R 2 and R 7 or R 2 and R 10 may be taken together to form —(CH 2 ) m —, where m=1-4; further provided that the cell adhesion inhibitor does not impart GP II b III a activity.

25. The cell adhesion inhibitor according to claim 24 , wherein A is selected from the group consisting of alkylamino; alkenylamino; alkynylamino; aryl-substituted alkylamino; aryl-substituted alkenylamino; aryl-substituted alkynylamino; arylamino; N-alkylurea-substituted alkyl; N-arylurea-substituted alkyl; alkylcarbonylamino-substituted alkyl; heterocyclyl; heterocyclyl-substituted amino; arylurea-substituted arylalkylcarbonylamino; heteroarylamido-substituted arylalkylcarbonylamino; arylurea-substituted arylurea and aliphatic acyl optionally substituted with N-alkyl- or N-arylamido.

26. The cell adhesion inhibitor according to claim 24 , wherein A is (N-Ar′-urea)-para-substituted arylamino or is (N-Ar′-urea)-para-substituted aralkylamino.

27. The cell adhesion inhibitor according to claim 24 , wherein each of R 1 and R 2 is independently hydrogen, or alkyl optionally substituted with cycloalkyl, cycloalkenyl, heterocycle, alkenyl, alkynyl, alkoxyl, hydroxyl, halogen, aralkoxy, thioalkoxy, carboxy, alkoxycarbonyl, or carboxamide and W is CO 2 H.