Pyrrolo[2,3-D]pyrimidine derivatives

1. A method for treating a disorder or condition selected from rheumatoid arthritis, lupus, psoriasis, atopic dermatitis, and inflammatory bowel disease, comprising the step of administering to a subject an effective amount of a composition comprising a compound of formula I having the structure:

or a pharmaceutically acceptable salt thereof, wherein

R 1 is hydrogen or C 1 -C 4 alkyl, wherein said alkyl is further optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, methoxy, amino, CF 3 , and C 3 -C 6 cycloalkyl;

X is selected from —NH— and —CR a R b —, where (a) R a and R b are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl, aryl, (aryl)C 1 -C 6 linear or branched chain alkyl, heteroaryl, (C 1 -C 6 linear or branched chain alkyl)heteroaryl, (heteroaryl)C 1 -C 6 linear or branched chain alkyl, (heterocyclic)C 1 -C 6 linear or branched chain alkyl, or (b) R a and R b together form a chain comprising —(CR c R d ) j —, where R c and R d are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, (C 1 -C 6 linear or branched chain alkyl)heteroaryl, halo, CN, CF 3 , hydroxyl, CONH 2 , or SO 2 CH 3 ;

Y is -A-R 5 , where A is a bond, —(CH 2 ) k — or —(CD 2 ) k - and R 5 is C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl, aryl, or —NR a′ R b′ , or is an unsaturated, saturated or partially saturated monocyclic or bicyclic ring structure containing a total of four to eleven atoms having one to three heteroatoms independently selected from the group consisting of oxygen, nitrogen, and sulfur, wherein said alkyl, C 3 -C 6 cycloalkyl, aryl, or monocyclic or bicyclic ring structure is further optionally substituted with one or more substituents selected from the group consisting of deuterium, halo, C 1 -C 6 linear or branched chain alkyl, CN, hydroxyl, CF 3 , —OR e , —NR e R f , —S(O) p R e and C 3 -C 6 cycloalkyl, where said alkyl and cycloalkyl may be optionally substituted with one or more substituents selected from the group consisting of halo, CN, hydroxyl, CONH 2 , and SO 2 CH 3 , where (a) R a′ and R b′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, or (C 1 -C 6 linear or branched chain alkyl)heteroaryl, where said alkyl and cycloalkyl may be optionally substituted with one or more R c′ , or (b) R a′ and R b′ together form a chain comprising —(CR c′ R d′ ) j —, where R c′ and R d′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, (C 1 -C 6 linear or branched chain alkyl)heteroaryl, halo, CN, hydroxyl, CF 3 , CONH 2 , —OR e , —NR e R f , or —S(O) p R e − ; where R e and R f are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, or C 3 -C 6 cycloalkyl, where said alkyl and cycloalkyl may be optionally substituted with one or more substituents selected from the group consisting of halo, CN, hydroxyl, CF 3 , and CONH 2 ;

j is 2, 3, 4 or 5; k is 1, 2; 3, or 4; p is 0, 1 or 2; and,

n is 1 or 2.

2. The method of claim 1 wherein the compound is a compound of formula IA having the structure:

or a pharmaceutically acceptable salt thereof, wherein Y is -A-R 5 , where A is a bond, —(CH 2 ) k — or —(CD 2 ) k - and R 5 is C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl, aryl, or —NR a′ R b′ , or is an unsaturated, saturated or partially saturated monocyclic or bicyclic ring structure containing a total of five to eleven atoms having one to three heteroatoms independently selected from the group consisting of oxygen, nitrogen, and sulfur, wherein said alkyl, C 3 -C 6 cycloalkyl, aryl, or monocyclic or bicyclic ring structure is further optionally substituted with one or more substituents selected from the group consisting of deuterium, halo, C 1 -C 6 linear or branched chain alkyl, CN, hydroxyl, CF 3 , —OR e , —NR e R f , —S(O) p R e and C 3 -C 6 cycloalkyl, where said alkyl and cycloalkyl may be optionally substituted with one or more substituents selected from the group consisting of halo, CN, hydroxyl, CONH 2 , and SO 2 CH 3 , where (a) R a′ and R b′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, or (C 1 -C 6 linear or branched chain alkyl)heteroaryl, where said alkyl and cycloalkyl may be optionally substituted with one or more R c′ , or (b) R a′ and R b′ together form a chain comprising —(CR c′ R d′ ) j —, where R c′ and R d′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, (C 1 -C 6 linear or branched chain alkyl)heteroaryl, halo, CN, hydroxyl, CF 3 , CONH 2 , —OR e , —NR e R f , or —S(O) p R e ; where R e and R f are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, or C 3 -C 6 cycloalkyl, where said alkyl and cycloalkyl may be optionally substituted with one or more substituents selected from the group consisting of halo, CN, hydroxyl, CF 3 , and CONH 2 ; j is 2, 3, 4 or 5; k is 1, 2; 3, or 4; and,

p is 0, 1 or 2.

3. The method of claim 2 wherein A is a bond and R 5 is a C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl or aryl.

4. The method of claim 2 wherein A is a bond or —(CH 2 ) k —, and R 5 is C 3 -C 6 cycloalkyl wherein said C 3 -C 6 cycloalkyl is further optionally substituted with one or more substituents selected from the group consisting of halo, C 1 -C 6 linear or branched chain alkyl, and CN where said alkyl and cycloalkyl may be optionally substituted with one or more substituents selected from the group consisting of halo, CN, hydroxyl, CONH 2 , and SO 2 CH 3 ; where k is 1, 2, or 3.

5. The method of claim 2 wherein A is a bond or —(CH 2 ) k —, and R 5 is an unsaturated, saturated or partially saturated monocyclic or bicyclic ring structure containing a total of five to eleven atoms having one to three heteroatoms independently selected from the group consisting of oxygen, nitrogen, and sulfur, wherein said alkyl, C 3 -C 6 cycloalkyl, aryl, or monocyclic or bicyclic ring structure is further optionally substituted with one or more substituents selected from the group consisting of deuterium, halo, C 1 -C 6 linear or branched chain alkyl, CN, hydroxyl, CF 3 , —S(O) p R e and C 3 -C 6 cycloalkyl; where k is 1, 2, or 3.

6. The method of claim 1 wherein the compound is a compound of formula IB having the structure:

or a pharmaceutically acceptable salt thereof, wherein

(a) R a′ and R b′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, or (C 1 -C 6 linear or branched chain alkyl)heteroaryl, where said alkyl and cycloalkyl may be optionally substituted with one or more R c ;

(b) R a′ and R b′ together form a chain comprising —(CR c′ R d′ ) j —, where R c′ and R d′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, (C 1 -C 6 linear or branched chain alkyl)heteroaryl, halo, CN, hydroxyl, CF 3 , CONH 2 , —OR e , —NR e R f , or —S(O) p R e ; where R e and R f are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, or C 3 -C 6 cycloalkyl, where said alkyl and cycloalkyl may be optionally substituted with one or more substituents selected from the group consisting of halo, CN, hydroxyl, CF 3 , and CONH 2 ; or,

(c) R a′ and R b′ together form an unsaturated, saturated or partially saturated monocyclic or bicyclic ring structure containing a total of five to eleven atoms having one to three heteroatoms independently selected from the group consisting of oxygen, nitrogen, and sulfur, wherein said monocyclic or bicyclic ring structure is further optionally substituted with one or more substituents selected from the group consisting of deuterium, halo, C 1 -C 6 linear or branched chain alkyl, CN, hydroxyl, CF 3 , —NR e R f , —OR e , —S(O) p R e and C 3 -C 6 cycloalkyl; j is 2, 3, 4 or 5; and, p is 0, 1 or 2.

7. The method of claim 1 wherein the compound is a compound of formula IC having the structure:

or a pharmaceutically acceptable salt thereof, wherein

(a) R a′ and R b′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, or (C 1 -C 6 linear or branched chain alkyl)heteroaryl, where said alkyl and cycloalkyl may be optionally substituted with one or more R c ;

(b) R a′ and R b′ together form a chain comprising —(CR c′ R d′ ) j —, where R c′ and R d′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, (C 1 -C 6 linear or branched chain alkyl)heteroaryl, halo, CN, hydroxyl, CF 3 , CONH 2 , —OR e , —NR e R f , or —S(O) p R e ; where R e and R f are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, or C 3 -C 6 cycloalkyl, where said alkyl and cycloalkyl may be optionally substituted with one or more substituents selected from the group consisting of halo, CN, hydroxyl, CF 3 , and CONH 2 ; or,

(c) R a′ and R b′ together form an unsaturated, saturated or partially saturated monocyclic or bicyclic ring structure containing a total of five to eleven atoms having one to three heteroatoms independently selected from the group consisting of oxygen, nitrogen, and sulfur, wherein said monocyclic or bicyclic ring structure is further optionally substituted with one or more substituents selected from the group consisting of deuterium, halo, C 1 -C 6 linear or branched chain alkyl, CN, hydroxyl, CF 3 , —NR e R f , —OR e , —S(O) p R e and C 3 -C 6 cycloalkyl; j is 2, 3, 4 or 5; and, p is 0, 1 or 2.

8. The method of claim 1 wherein the compound is a compound of formula ID having the structure:

or a pharmaceutically acceptable salt thereof, wherein

Y is -AR 5 , where A is a bond or —(CH 2 ) k —, and R 5 is C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl, aryl, or is an unsaturated, saturated or partially saturated monocyclic or bicyclic ring structure containing a total of five to eleven atoms having one to three heteroatoms independently selected from the group consisting of oxygen, nitrogen, and sulfur, wherein said alkyl, C 3 -C 6 cycloalkyl, aryl, or monocyclic or bicyclic ring structure is further optionally substituted with one or more substituents selected from the group consisting of deuterium, halo, C 1 -C 6 linear or branched chain alkyl, CN, hydroxyl, CF 3 , —NR a′ R b′ , —OR e , —S(O) p R e and C 3 -C 6 cycloalkyl, where said alkyl and cycloalkyl may be optionally substituted with one or more substituents selected from the group consisting of halo, CN, hydroxyl, CONH 2 , and SO 2 CH 3 , where (a) R a′ and R b′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, C 3 -C 6 cycloalkyl, aryl, (aryl)C 1 -C 6 linear or branched chain alkyl, heteroaryl, (C 1 -C 6 linear or branched chain alkyl)heteroaryl, (heteroaryl)C 1 -C 6 linear or branched chain alkyl, (heterocyclic)C 1 -C 6 linear or branched chain alkyl, where said alkyl and cycloalkyl may be optionally substituted with one or more R c′ , or (b) R a′ and R b′ together form a chain comprising —(CR c′ R d′ ) j —, where R c′ and R d′ are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, aryl, (C 1 -C 6 linear or branched chain alkyl)aryl, heteroaryl, (C 1 -C 6 linear or branched chain alkyl)heteroaryl, halo, CN, hydroxyl, CF 3 , CONH 2 , —OR e , —NR e R f , or —S(O) p R e ; where R e and R f where are independently hydrogen, deuterium, C 1 -C 6 linear or branched chain alkyl, or C 3 -C 6 cycloalkyl, where said alkyl and cycloalkyl may be optionally substituted with one or more substituents selected from the group consisting of halo, CN, hydroxyl, CF 3 , and CONH 2 ; j is 2, 3, 4 or 5; k is 1, 2, or 3; and, p is 0, 1 or 2.

9. The method of claim 1 wherein the compound is selected from the group consisting of:

4-cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}pyridine-2-sulfonamide;

2,2,2-trifluoro-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-ethanesulfonamide;

2-methyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-propane-1-sulfonamide;

N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}propane-1-sulfonamide;

1-cyclopropyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-methanesulfonamide;

N-{cis-3-[(butylsulfonyl)methyl]cyclobutyl}-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine;

1-cyclopropyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-azetidine-3-sulfonamide;

3-cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-azetidine-1-sulfonamide;

(1R,5S)—N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-6-oxa-3-azabicyclo[3.1.1]heptane-3-sulfonamide;

(3R)-3-cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-pyrrolidine-1-sulfonamide;

(3S)-3-cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-pyrrolidine-1-sulfonamide;

N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-1-(oxetan-3-yl)methane-sulfonamide;

1-(3,3-difluorocyclobutyl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methane-sulfonamide;

trans-3-(cyanomethyl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]-cyclobutyl}cyclo-butanesulfonamide;

cis-3-(cyanomethyl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]-cyclobutyl}cyclobutane-sulfonamide;

N-[cis-3-({[(3,3-difluorocyclobutyl)methyl]sulfonyl}methyl)cyclobutyl]-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine;

(1S,5S)-1-cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-3-azabicyclo[3.1.0]hexane-3-sulfonamide;

(1R,5R)-1-cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-3-azabicyclo[3.1.0]hexane-3-sulfonamide;

(3R)-1-[({cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}meth-yl)sulfonyl]pyrrolidine-3-carbonitrile;

1-[({cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)sulfonyl]-4-(trifluoromethyl)piperidin-4-ol;

N-(cis-3-{[(4, 4-difluoropiperidin-1-yl)sulfonyl]methyl}cyclobutyl)-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine;

(3S)-1-[({cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}meth-yl)sulfonyl]pyrrolidine-3-carbonitrile;

N-(cis-3-{[(3-chloro-4-fluorophenyl)sulfonyl]methyl}cyclobutyl)-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine;

N-(cis-3-{[(2-cyclopropylethyl)sulfonyl]methyl}cyclobutyl)-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine;

N-methyl-N-[cis-3-({[1-(propan-2-yl)pyrrolidin-3-yl]sulfonyl}methyl)cyclobutyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine;

3,3-difluoro-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}cyclobutane-sulfonamide;

1-[3-(cyanomethyl)oxetan-3-yl]-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-methanesulfonamide;

cis-3-(cyanomethyl)-3-methyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-cyclobutanesulfonamide;

trans-3-(cyanomethyl)-3-methyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}cyclobutanesulfonamide;

N-(2-cyanoethyl)-N-methyl-N′-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}sulfuric diamide;

N-{(1S,3R)-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclopentyl}propane-1-sulfonamide;

3-(2-hydroxypropan-2-yl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}benzene-sulfonamide;

N-(cyclopropylmethyl)-N′-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}sulfuric diamide;

N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-4-(1H-pyrazol-3-yl)piperidine-1-sulfonamide;

2-methyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-2,6-dihydropyrrolo[3,4-c]pyrazole-5(4H)-sulfonamide;

N-cyclopropyl-1-{trans-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methane-sulfonamide;

2-[({cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)sulfonyl]pyridine-4-carbonitrile;

(1S,3S)-3-[({cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)-sulfonyl]cyclopentanecarbonitrile;

(1R,3R)-3-[({cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)sulfonyl]cyclopentanecarbonitrile;

1-cyclopropyl-N-{trans-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methane sulfonamide;

3-cyano-N-{trans-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}pyrrolidine-1-sulfonamide;

N-methyl-N-{trans-3-[(propylsulfonyl)methyl]cyclobutyl}-7H-pyrrolo[2,3-d]pyrimidin-4-amine; and,

2-methyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-1,3-thiazole-5-sulfonamide; or, a pharmaceutically acceptable salt thereof.

10. The method of claim 1 wherein the compound is 2-methyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-1,3-thiazole-5-sulfonamide, or a pharmaceutically acceptable salt thereof.

11. The method of claim 1 wherein the compound is N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-propane-1-sulfonamide, or a pharmaceutically acceptable salt thereof.

12. The method of claim 1 wherein the compound is trans-3-(cyanomethyl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}cyclobutanesulfonamide or a pharmaceutically acceptable salt thereof.

13. The method of claim 1 wherein the compound is 1-(3,3-difluorocyclobutyl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methanesulfonamide or a pharmaceutically acceptable salt thereof.

14. The method of claim 1 wherein the compound is N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-1-(oxetan-3-yl)methanesulfonamide or a pharmaceutically acceptable salt thereof.

15. The method of claim 1 wherein the compound is (3R)-1-[({cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)sulfonyl]pyrrolidine-3-carbonitrile or a pharmaceutically acceptable salt thereof.

16. The method of claim 1 wherein the compound is 3,3-difluoro-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}cyclobutanesulfonamide or a pharmaceutically acceptable salt thereof.

17. The method of treating psoriasis of claim 1 comprising the step of administering to a subject an effective amount of a composition comprising the compound:

(3R)-1-[({cis-3-[Methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)sulfonyl]pyr-rolidine-3-carbonitrile; or, a pharmaceutically acceptable salt thereof.

18. The method of treating psoriasis of claim 1 comprising the step of administering to a subject an effective amount of a composition comprising the compound:

N-{cis-3-[Methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-propane-1-sulfonamide; or, a pharmaceutically acceptable salt thereof.

19. The method of treating psoriasis of claim 1 comprising the step of administering to a subject an effective amount of a composition comprising the compound:

3-Cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]-cyclobutyl}azetidine-1-sulfonamide; or, a pharmaceutically acceptable salt thereof.

20. The method of treating lupus of claim 1 comprising the step of administering to a subject an effective amount of a composition comprising a compound selected from the group consisting of

2-methyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-1,3-thiazole-5-sulfonamide;

N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-propane-1-sulfonamide;

trans-3-(cyanomethyl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}cyclobutanesulfonamide;

1-(3,3-difluorocyclobutyl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methanesulfonamide;

N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-1-(oxetan-3-yl)methanesulfonamide;

(3R)-1-[({cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)sulfonyl]pyrrolidine-3-carbonitrile;

3,3-difluoro-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}cyclobutanesulfonamide; and,

(1S,5S)-1-cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-3-azabicyclo[3.1.0]hexane-3-sulfonamide; or, a pharmaceutically acceptable salt thereof.

21. The method of claim 19 wherein the compound is:

(1S,5S)-1-Cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-3-azabicyclo[3.1.0]hexane-3-sulfonamide; or, a pharmaceutically acceptable salt thereof.

22. The method of claim 19 wherein the compound is:

(3R)-1-[({cis-3-[Methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)sulfonyl]pyr-rolidine-3-carbonitrile; or, a pharmaceutically acceptable salt thereof.

23. The method of claim 19 wherein the compound is:

N-{cis-3-[Methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-propane-1-sulfonamide; or, a pharmaceutically acceptable salt thereof.

24. The method of claim 19 wherein the compound is:

3-Cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]-cyclobutyl}azetidine-1-sulfonamide; or, a pharmaceutically acceptable salt thereof.

25. The method of treating atopic dermatitis of claim 1 comprising the step of administering to a subject an effective amount of a composition comprising a compound selected from the group consisting of

2-methyl-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-1, 3-thiazole-5-sulfonamide;

N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-propane-1-sulfonamide;

trans-3-(cyanomethyl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}cyclobutanesulfonamide;

1-(3,3-difluorocyclobutyl)-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methanesulfonamide;

N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-1-(oxetan-3-yl)methanesulfonamide;

(3R)-1-[({cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)sulfonyl]pyrrolidine-3-carbonitrile;

3,3-difluoro-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}cyclobutanesulfonamide; and,

(1S,5S)-1-cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-3-azabicyclo[3.1.0]hexane-3-sulfonamide; or, a pharmaceutically acceptable salt thereof.

26. The method of claim 25 wherein the compound is:

(1S,5S)-1-Cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-3-azabicyclo[3.1.0]hexane-3-sulfonamide; or, a pharmaceutically acceptable salt thereof.

27. The method of claim 25 wherein the compound is:

(3R)-1-[({cis-3-[Methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}methyl)sulfonyl]pyr-rolidine-3-carbonitrile; or, a pharmaceutically acceptable salt thereof.

28. The method of claim 25 wherein the compound is:

N-{cis-3-[Methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]cyclobutyl}-propane-1-sulfonamide; or, a pharmaceutically acceptable salt thereof.

29. The method of claim 25 wherein the compound is:

3-Cyano-N-{cis-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]-cyclobutyl}azetidine-1-sulfonamide; or, a pharmaceutically acceptable salt thereof.