Streptogramin derivatives, their preparation and compositions containing them

1. A pharmaceutical composition comprising (1) at least one group A streptogramin compound of formula (I) or a salt thereof, (2) at least one group B streptogramin compound, and optionally (3) at least one pharmaceutically acceptable diluent or adjuvant, wherein formula (I) has the following formula:

in which

R 1 is chosen from a halogen atom, an azido group, and a thiocyanato group;

R 2 is chosen from a hydrogen atom, a methyl group, and an ethyl group;

3 is chosen from a hydrogen atom, an aliphatic ester, a cycloaliphatic ester, an aromatic ester, an araliphatic ester, a heterocyclic ester, and a heterocyclylaliphatic ester, wherein said esters may be substituted or unsubstituted; and

the bond --- represents a single bond (stereochemistry 27R) or a double bond.

2. A pharmaceutical composition according to claim 1 , wherein the group B streptogramin compound is chosen from pristinamycin I A , pristinamycin I B , pristinamycin I C , pristinamycin I D , pristinamycin I E , pristinamycin I F , pristinamycin I G , virginiamycin S 1 , S 3 , and S 4 , vernamycin B and C, and etamycin.

3. A pharmaceutical composition according to claim 2 , wherein the group B streptogramin compound is chosen from a semisynthetic compound of formula (A):

wherein,

(1) Rb, Rc, Re and Rf are each a hydrogen atom;

Rd is chosen from a hydrogen atom and a dimethylamino group; and

Ra is chosen from:

(A) —CH 2 R′a, wherein R′a is chosen from (i) 3-pyrrolidinylthio, (ii) 3-piperidylthio, (iii) 4-piperidylthio, wherein said groups (i)–(iii) may each be unsubstituted or substituted with at least one alkyl, (iv) alkylthio substituted with 1 or 2 groups chosen from:

(a) hydroxysulfonyl, (b) alkylamino, (c) dialkylamino, (d) unsubstituted or substituted piperazine rings, (e) morpholino, (f) thiomorpholino, (g) piperidino, (h) 1-pyrrolidinyl, (i) 2-piperidyl, (j) 3-piperidyl, (k) 4-piperidyl, (l) 2-pyrrolidinyl, or (m) 3-pyrrolidinyl;

(B) ═CHR′a, wherein R′a is chosen from:

(i) 3-pyrrolidinylamino, 3-piperidylamino, 4-piperidylamino, 3-pyrrolidinyloxy, 3-piperidyloxy, 4-piperidyloxy, 3-pyrrolidinylthio, 3-piperidylthio, and 4-piperidylthio, which may each be substituted with at least one alkyl, and

(ii) alkylamino, alkyloxy, and alkylthio wherein said alkylamino, said alkyloxy, and said alkylthio are substituted with 1 or 2 groups chosen from:

(a) hydroxysulfonyl, (b) alkylamino, (c) dialkylamino unsubstituted or substituted with dialkylamino, (d) trialkylammonio, (e) 4-imidazolyl, (f) 5-imidazolyl, (g) unsubstituted or substituted piperazine rings, (h) morpholino, (i) thiomorpholino, (j) piperidino, (k) 1-pyrrolidinyl, (l) 2-piperidyl, (m) 3-piperidyl, (n) 4-piperidyl, (o) 2-pyrrolidinyl, or (p) 3-pyrrolidinyl; and

(C) a 3- or 4-quinuclidinyithiomethyl group; or

(2) Ra is a hydrogen atom, and

Rb, Rc, Rd, Re, and Rf are chosen from:

(a) Rb, Re, and Rf are each a hydrogen atom,

Rd is chosen from —NHCH 3 and —N(CH 3 ) 2 , wherein when Rd is —NHCH 3 , Rc is chosen from chlorine and bromine, and wherein when Rd is —N(CH 3 ) 2 , then Rc is chosen from chlorine, bromine, and an alkenyl group containing from 3 to 5 carbon atoms,

(b) Rb, Rd, Re and Rf are each a hydrogen atom, and

Rc is chosen from a halogen atom, an aminomonoalkyl, an aminodialkyl, an alkyloxy, a trifluoromethyloxy, a thioalkyl, a (C 1 to C 3 ) alkyl group, and a trihalomethyl group,

(c) Rb, Rc, Re, and Rf are each a hydrogen atom, and

Rd is chosen from a halogen atom, an ethylamino, a diethylamino, a methylethylamino, an alkyloxy, a trifluoromethyloxy, a thioalkyl, an (C 1 to C 6 ) alkyl group, an aryl group, and a trihalomethyl group,

(d) Rb, Re, and Rf are each a hydrogen atom,

Rc is chosen from a halogen atom, an aminomonoalkyl, an aminodialkyl, an alkyloxy, a trifluoromethyloxy, a thioalkyl, and a (C 1 to C 6 ) alkyl group, and

Rd is chosen from a halogen atom, an amino, an aminomonoalkyl, an aminodialkyl, an alkyloxy, a trifluoromethyloxy, a thioalkyl, a (C 1 to C 6 ) alkyl group, and a trihalomethyl group, and

(e) Rc, Re and Rf are each a hydrogen atom, and

Rb and Rd are each a methyl group.

4. A pharmaceutical composition according to claim 1 , wherein the group B streptogramin compound is a semisynthetic compound of formula (B) or a salt thereof:

wherein,

Y is ═CR 3 —;

R 1 is chosen from:

(1) a hydrogen atom,

(2) a (C 1 to C 8 ) alkyl group,

(3) a (C 2 to C 8 ) alkenyl group,

(4) a (C 3 to C 8 ) cycloalkyl group,

(5) a (C 3 to C 8 ) saturated or unsaturated heterocyclyl group,

(6) an unsubstituted phenyl group,

(7) a substituted phenyl group which is substituted with one or more halogen atoms, hydroxyl groups, alkyl groups, alkyloxy groups, alkylthio groups, alkylsulfinyl groups, alkylsulfonyl groups, amino groups, alkylamino groups, or dialkylamino groups, and

(8) a group NR′R″, wherein R′ and R″, which may be identical or different, are chosen from: (i) a hydrogen atom, (ii) a (C 1 to C 3 ) alkyl group, (iii) a halomethyl, (iv) a hydroxymethyl, (v) an alkyloxymethyl, (vi) an alkylthio-methyl in which the alkyl portion may be unsubstituted or substituted with NR′R″, (vii) an alkylsulfinylmethyl, (viii) an alkylsulfonylmethyl, (ix) an acyloxymethyl, (x) a benzoyloxy-methyl, (xi) a cyclopropylaminomethyl, (xii) a —(CH 2 ) n NR′R″ group, wherein n is an integer ranging from 1 to 4, and (xiii) a 3- to 8-membered heterocycle formed with the nitrogen atom to which they are attached, and

if R 3 is a hydrogen atom, R 1 may also be chosen from a formyl, a carboxyl, an alkyloxycarbonyl, and a —CO—NR′R″ group, wherein R′ and R′ are defined as above;

R 2 is chosen from a hydrogen atom and a (C 1 to C 3 ) alkyl group;

R 3 is chosen from a hydrogen atom, an alkyl group, a carboxyl group, an alkyloxycarbonyl group, and a —CO—NR′R″ group, wherein R′ and R″ are defined as above;

Ra is chosen from a methyl group and an ethyl group; and

Rb, Rc and Rd are defined below:

a) Rb and Rc are each a hydrogen atom; and

Rd is chosen from a hydrogen atom, a methylamino group, and a dimethylamino group; or

b) Rb is a hydrogen atom;

Rc is chosen from a hydrogen atom, chlorine, bromine , and a (C 3 to C 5 ) alkenyl group; and

Rd is —Nme-R′″, wherein R′″ is chosen from:

(1) an alkyl, a (C 2 to C 4 ) hydroxyalkyl, or a (C 2 to C 8 ) alkenyl which is unsubstituted or substituted with:

(i) a phenyl, (ii) a (C 3 to C 6 ) cycloalkylmethyl, (iii) an unsubstituted benzyl, (iv) a substituted benzyl which is substituted with one or more halogen atoms, hydroxyl groups, alkyl groups, alkyloxy groups, alkylthio groups, alkylsulfinyl groups, alkylsulfonyl groups, amino groups, alkylamino groups, dialkylamino groups, (v) a heterocyclylmethyl or heterocyclylethyl in which the heterocyclyl portion is saturated or unsaturated and contains 5 to 6 members and at least one heteroatom chosen from sulfur, oxygen, and nitrogen, wherein the heterocyclyl portion is unsubstituted or substituted with:

an alkyl group, a (C 2 to C 8 ) alkenyl group, a (C 3 to C 6 ) cycloalkyl group, a (C 4 to C 6 ) saturated or unsaturated heterocyclyl group, a phenyl group, a benzyl group, or a phenyl group which is substituted with a group chosen from a hydrogen atom, a (C 1 to C 8 ) alkyl group, a (C 2 to C 8 ) alkenyl group, a (C 3 to C 8 ) cycloalkyl group, a (C 3 to C 8 ) saturated or unsaturated heterocyclyl group, an unsubstituted phenyl group, a substituted phenyl group substituted with one or more halogen atoms, hydroxyl groups, alkyl groups, alkyloxy groups, alkylthio groups, alkylsulfinyl groups, alkylsulfonyl groups, amino groups, alkylamino groups, or dialkylamino groups, and a group NR′R″;

(2) a cyanomethyl group or a —CH 2 CORe group,

wherein Re is chosen from:

(a) —OR′e, wherein R′e is chosen from: (i) a hydrogen atom, (ii) (C 1 to C 6 ) alkyl, (iii) (C 2 to C 6 ) alkenyl, (iv) benzyl and (v) heterocyclylmethyl in which the heterocyclyl portion contains 5 to 6 members and 1 or 2 heteroatoms chosen from sulfur, oxygen, and nitrogen; and

(b) an alkylamino group, an alkylmethylamino group, a heterocyclylamino group, and a heterocyclylmethylamino group in which the heterocyclyl portion is saturated and contains from 5 to 6 members and one or two heteroatoms chosen from sulfur, oxygen, and nitrogen which may themselves be unsubstituted or substituted with an alkyl, benzyl or alkyloxycarbonyl group;

c) Rb is a hydrogen atom;

Rd is chosen from —NHCH 3 and —N(CH 3 ) 2 , wherein when Rd is —NHCH 3 , Rc is chosen from chlorine and bromine, and wherein when Rd is —N(CH 3 ) 2 , then Rc is chosen from chlorine, bromine, and an alkenyl group containing from 3 to 5 carbon atoms;

d) Rb and Rd are each hydrogen atom; and

Rc is chosen from a halogen atom, an alkylamino, a dialkylamino, an alkyloxy, a trifluoromethoxy, a thioalkyl, a (C 1 to C 6 ) alkyl, and a trihalomethyl group;

e) Rb and Rc are each hydrogen atom, and

Rd is chosen from a halogen atom, an ethylamino, a diethylamino, a methylethylamino, an alkyloxy, a trifluoromethoxy, an alkylthio, an alkylsulfinyl, an alkylsulfonyl, a (C 1 to C 6 ) alkyl, a phenyl group, and a trihalomethyl group;

f) Rb is a hydrogen atom;

Rc is chosen from a halogen atom, an alkylamino, a dialkylamino, an alkyloxy, a trifluoromethoxy, a thioalkyl, and a (C 1 to C 3 ) alkyl group; and

Rd is chosen from a halogen atom, an amino, an alkylamino, a dialkylamino, an alkyloxy, a trifluoromethoxy, a thioalkyl, a (C 1 to C 6 ) alkyl, and a trihalomethyl group; and

g) Rc is a hydrogen atom; and

Rb and Rd are each a methyl group.

5. The pharmaceutical composition according to claim 3 , wherein the dialkylamino of (1)(A)(iv)(c) is substituted with mercapto or dialkylamino.

6. A pharmaceutical composition according to claim 3 , wherein said 4-imidazolyl, said 5-imidazolyl, said unsubstituted or substituted piperazine rings, said morpholino, said thiomorpholino, said piperidino, said 1-pyrrolidinyl, said 2-piperidyl, said 3-piperidyl, said 4-piperidyl, said 2-pyrrolidinyl, or said 3-pyrrolidinyl may be substituted with alkyl.

7. A pharmaceutical composition according to claim 4 , wherein the 3-to 8-membered saturated or unsaturated heterocyclyl group of R 1 further comprises another heteroatom chosen from oxygen, sulfur, and nitrogen.

8. A pharmaceutical composition according to claim 4 , wherein the 3- to 8-membered saturated or unsaturated heterocyclyl group is substituted with at least one group chosen from an alkyl, a (C 2 to C 8 ) alkenyl group, a (C 3 to C 6 ) cycloalkyl group, a (C 4 to C 6 ) saturated or unsaturated heterocyclyl group, a benzyl group, a phenyl group, and a phenyl group which is substituted with one or more halogen atoms, hydroxyl groups, alkyl groups, alkyloxy groups, alkylthio groups, alkylsulfinyl groups, alkylsulfonyl groups, amino groups, alkylamino groups, or dialkylamino groups.

9. A pharmaceutical composition according to claim 1 , wherein the group B streptogramin compound is a semisynthetic compound of formula (B) or a salt thereof:

wherein,

Y is nitrogen;

R 1 is chosen from:

(1) a hydrogen atom,

(2) a (C 1 to C 8 ) alkyl group,

(3) a (C 2 to C 8 ) alkenyl group,

(4) a (C 3 to C 8 ) cycloalkyl group,

(5) a (C 3 to C 8 ) saturated or unsaturated heterocyclyl group,

(6) an NH group,

(7) an unsubstituted phenyl group,

(8) a substituted phenyl group which is substituted with one or more halogen atoms, hydroxyl groups, alkyl groups, alkyloxy groups, alkylthio groups, alkylsulfinyl groups, alkylsulfonyl groups, amino groups, alkylamino groups, or dialkylamino groups,

(9) a group NR′R″, wherein R′ and R″, which may be identical or different, are chosen from: (i) a hydrogen atom, (ii) a (C 1 to C 3 ) alkyl group, (iii) a halomethyl, (iv) a hydroxymethyl, (v) an alkyloxymethyl, (vi) an alkylthio-methyl in which the alkyl portion is optionally substituted with NR′R″, (vii) an alkylsulfinylmethyl, (viii) an alkylsulfonylmethyl, (ix) an acyloxymethyl, (x) a benzoyloxy-methyl, (xi) a cyclopropylaminomethyl, (xii) a —(CH 2 ) n NR′R″ group, wherein n is an integer from 1 to 4, and (xiii) a 3- to 8-membered heterocycle formed with the nitrogen atom to which they are attached, and

(10) —XR o , wherein

X is an oxygen atom, a sulfur atom, a sulfinyl group, or a sulfonyl group, and

R o is chosen from a (C 1 to C 8 ) alkyl group, a (C 3 to C 6 ) cycloalkyl group, a (C 3 to C 8 ) saturated or unsaturated heterocyclyl group, and a (C 3 to C 8 ) heterocyclylmethyl group in which the heterocyclyl portion is attached to the methyl group by a carbon atom, a phenyl group, a phenyl group which is substituted with one or more halogen atoms, hydroxyl groups, alkyl groups, alkyloxy groups, alkylthio groups, alkylsulfinyl groups, alkylsulfonyl groups, amino groups, alkylamino groups, dialkylamino groups, or a —(CH 2 ) n NR′R″ group, wherein n is an integer ranging from 2 to 4, and wherein if X is NH, R o may also be a hydrogen atom; and

if R 3 is a hydrogen atom, R 1 may also be chosen from a formyl, a carboxyl, an alkyloxycarbonyl, and a —CO—NR′R″ group, wherein R′ and R″ are defined as above;

R 2 is chosen from a hydrogen atom and a (C 1 to C 3 ) alkyl group;

R 3 is chosen from a hydrogen atom, an alkyl group, a carboxyl group, an alkyloxycarbonyl group, and a —CO—NR′R″, wherein R′ and R″ are defined as above;

Ra is chosen from a methyl group and an ethyl group; and

Rb, Rc and Rd are defined below:

a) Rb and Rc are each hydrogen atom; and

Rd is chosen from a hydrogen atom, a methylamino group, and a dimethylamino group; or

b) Rb is a hydrogen atom;

Rc is chosen from a hydrogen atom, chlorine, bromine, and a (C 3 to C 5 ) alkenyl group; and

Rd is —Nme-R′″ wherein R′″ is chosen from:

(1) an alkyl, a (C 2 to C 4 ) hydroxyalkyl, or a (C 2 to C 8 ) alkenyl which is unsubstituted or substituted with:

(i) a phenyl, (ii) a (C 3 to C 6 ) cycloalkylmethyl, (iii) an unsubstituted benzyl, (iv) a substituted benzyl which is substituted with one or more halogen atoms, hydroxyl groups, alkyl groups, alkyloxy groups, alkylthio groups, alkylsulfinyl groups, alkylsulfonyl groups, amino groups, alkylamino groups, or dialkylamino groups, (v) heterocyclylmethyl or heterocyclylethyl in which the heterocyclyl portion is saturated or unsaturated and contains from 5 to 6 members and at least one heteroatom chosen from sulfur, oxygen or nitrogen, wherein the heterocyclyl portion is unsubstituted or substituted with:

an alkyl group, a (C 2 to C 8 ) alkenyl group, a (C 3 to C 6 ) cycloalkyl group, a (C 4 to C 6 ) saturated or unsaturated heterocyclyl group, a phenyl group, a benzyl group, and a phenyl group which is substituted with a group chosen from a hydrogen atom, a (C 1 to C 8 ) alkyl group, a (C 2 to C 8 ) alkenyl group, a (C 3 to C 8 ) cycloalkyl group, a (C 3 to C 8 ) saturated or unsaturated heterocyclyl group, an unsubstituted phenyl group, a substituted phenyl group substituted with one or more halogen atoms, hydroxyl groups, alkyl groups, alkyloxy groups, alkylthio groups, alkylsulfinyl groups, alkylsulfonyl groups, amino groups, alkylamino groups, or dialkylamino groups, and a group NR′R″; or

(2) a cyanomethyl group or a —CH 2 CORe group,

wherein Re is chosen from:

(a) —OR′e, wherein R′e is chosen from: (i) a hydrogen atom, (ii) (C 1 to C 6 ) alkyl, (iii) (C 2 to C 6 ) alkenyl, (iv) benzyl and (v) heterocyclylmethyl in which the heterocyclyl portion contains 5 to 6 members and 1 or 2 heteroatoms chosen from sulfur, oxygen, and nitrogen; and

(b) an alkylamino group, an alkylmethylamino group, a heterocyclylamino group, and a heterocyclylmethylamino group in which the heterocyclyl portion is saturated and contains from 5 to 6 members and one or two heteroatoms chosen from sulfur, oxygen, and nitrogen which themselves are unsubstituted or substituted with an alkyl, benzyl or alkyloxycarbonyl group; or

c) Rb is a hydrogen atom;

Rd is chosen from —NHCH 3 and —N(CH 3 ) 2 , wherein when Rd is —NHCH 3 , Rc is chosen from chlorine and bromine, and wherein when Rd is —N(CH 3 ) 2 , then Rc is chosen from chlorine, bromine, and an alkenyl group containing 3 to 5 carbon atoms; or

d) Rb and Rd are each hydrogen atom; and

Rc is chosen from a halogen atom, an alkylamino, a dialkylamino, an alkyloxy, a trifluoromethoxy, a thioalkyl, a (C 1 to C 6 ) alkyl, and a trihalomethyl group; or

e) Rb and Rc are each hydrogen atom, and

Rd is chosen from a halogen atom, an ethylamino, a diethylamino, a methylethylamino, an alkyloxy, a trifluoromethoxy, an alkylthio, an alkylsulfinyl, an alkylsulfonyl, a (C 1 to C 6 ) alkyl, a phenyl group, and a trihalomethyl group; or

f) Rb is a hydrogen atom;

Rc is chosen from a halogen atom, an alkylamino, a dialkylamino, an alkyloxy, a trifluoromethoxy, a thioalkyl, and a (C 1 to C 3 ) alkyl group; and

Rd is chosen from a halogen atom, an amino, an alkylamino, a dialkylamino, an alkyloxy, a trifluoromethoxy, a thioalkyl, a (C 1 to C 6 ) alkyl, and a trihalomethyl group; or

g) Rc is a hydrogen atom; and

Rb and Rd are each a methyl group.

10. A pharmaceutical composition according to claim 9 , wherein the 3- to 8-membered saturated or unsaturated heterocyclyl group of R 1 further comprises another heteroatom chosen from oxygen, sulfur, and nitrogen.

11. A pharmaceutical composition according to claim 9 , wherein the 3- to 8-membered saturated or unsaturated heterocyclyl group is substituted with at least one group chosen from an alkyl, a (C 2 to C 8 ) alkenyl group, a (C 3 to C 6 ) cycloalkyl group, a (C 4 to C 6 ) saturated or unsaturated heterocyclyl group, a benzyl group, a phenyl group, and a phenyl group which is substituted with at least one halogen atom, hydroxyl, alkyl, alkyloxy, alkylthio, alkylsulfinyl, alkylsulfonyl, amino, alkylamino, or dialkylamino group.