6'-N-alkyl-4,6-di-O-(aminoglycosyl)-1,3-diaminocyclitols, methods for their use as antibacterial agents and compositions useful therefor

A per-N-protected aminoglycoside selected from the group consisting of

• 1,3,2',3"-tetra-N-Z-6'-N-Y-sisomicin,
• 1,3,2',3"-tetra-N-Z-6'-N-Y-Antibiotic 66-40B,
• 1,3,2',3"-tetra-N-Z-6'-N-Y-Antibiotic 66-40D,
• 1,3,2',3"-tetra-N-Z-6'-N-Y-Antibiotic Mu-1,
• 1,3,2',3"-tetra-N-Z-6'-N-Y-Antibiotic Mu-2,
• 1,3,2',3"-tetra-N-Z-6'-N-Y-Antibiotic Mu-4,
• 1,3,5,2',3"-penta-N-Z-6'-N-Y-Antibiotic Mu-5,
• 1,3,5,2',3"-penta-N-Z-6'-N-Y-5-epi-amino-5-deoxy-gentamicin C.sub.1a,
• 1,3,5,3"-tetra-N-Z-6'-N-Y-5-epi-amino-5-deoxy-gentamicin B,
• 1,3,5,2',3"-penta-N-Z-6'-N-Y-5-amino-5-deoxy-Antibiotic JI-20A,
• 1,3,5,2',3"-penta-N-Z-6'-N-Y-5-epi-amino-5-deoxy-sisomicin,
• 1,3,5,2',3"-penta-N-Z-6'-N-Y-5-epi-amino-5-deoxy-Antibiotic 66-40B,
• 1,3,5,2',3"-penta-N-Z-6'-N-Y-5-epi-amino-5-deoxy-Antibiotic 66-40D;
• and
• the 5-epi- and 5-epi-azido-5-deoxy analogs of the following:
• 1,3,2',3"-tetra-N-Z-6'-N-Y-gentamicin C.sub.1a,
• 1,3,3"-tri-N-Z-6'-N-Y-gentamicin B,
• 1. 3,2',3"-tetra-N-Z-6'-N-Y-Antibiotic JI-20A,
• 1,3,2',3"-tetra-N-Z-6'-N-Y-sisomicin,
• 1,3,2',3"-tetra-N-Z-6'-N-Y-Antibiotic 66-40B, and
• 1,3,2',3"-tetra-N-Z-6'-N-Y-Antibiotic 66-40D,
• wherein Y is a member selected from the group consisting of trifluoroacetyl, benzyloxycarbonyl and tert.-butoxy-carbonyl;
• Z is a member selected from the group consisting of a hydrocarboncarbonyl having up to 8 carbon atoms, benzyloxycarbonyl, and tert.-betoxycarbonyl with the proviso that in a given compound Y and Z are different, with Z being a group which remains intact under conditions in which Y is removed.

A 6'-N-unsubstituted-poly-N-protected aminoglycoside selected from the group consisting of

• 1,3,2',3"-tetra-N-Z-sisomicin,
• 1,3,2',3"-tetra-N-Z-Antibiotic 66-40B,
• 1,3,2',3"-tetra-N-Z-Antibiotic 66-40D,
• 1,3,2',3"-tetra-N-Z-Antibiotic Mu-1,
• 1,3,2',3"-tetra-N-Z-Antibiotic Mu-2,
• 1,3,2',3"-tetra-N-Z-Antibiotic Mu-4,
• 1,3,5,2',3"-penta-N-Z-Antibiotic Mu-5,
• 1,3,5,2',3"-penta-N-Z-5-epi-amino-5-deoxygentamicin C.sub.1a,
• 1,3,5,3"-tetra-N-Z-5-epi-amino-5-deoxygentamicin B,
• 1. 3,5,2',3"-penta-N-Z-5-epi-amino-5-deoxy-Antibiotic JI-20A,
• 1,3,5,2',3"-penta-N-Z-5-epi-amino-5-deoxysisomicin,
• 1,3,5,2',3"-penta-N-Z-5-epi-amino-5-deoxy-Antibiotic 66-40B, and
• 1,3,5,2',3"-penta-N-Z-5-epi-amino-5-deoxy-Antibiotic 66-40D;
• the 5-epi- and 5-epi-azido-5-deoxy- analogs of the following:
• 1,3,2',3"-tetra-N-Z-gentamicin C.sub.1a,
• 1,3,3"-tri-N-Z-gentamicin B,
• 1,3,2',3"-tetra-N-Z-Antibiotic JI-20A,
• 1,3,2',3"-tetra-N-Z-sisomicin,
• 1,3,2',3"-tetra-N-Z-Antibiotic 66-40B, and
• 1,3,2',3"-tetra-N-Z-Antibiotic 66-40D,
• wherein Z is a hydrocarboncarbonyl having up to 8 carbon atoms, benzyloxycarbonyl, or tert.-butoxycarbonyl.

The method of eliciting an antibacterial response in a warm-blooded animal having a susceptible bacterial infection, which comprises administering to said animal a non-toxic, antibacterially effective amount of a member selected from the group consisting of a 6'-N-alkylaminoglycoside derivative selected from the group consisting of

• ' -N-X-sisomicin,
• 6'-N-X-Antibiotic 66-40B,
• 6'-n-x-antibiotic 66-40D,
• 6'-n-x-antibiotic Mu-1,
• 6'-N-X-Antibiotic Mu-2,
• 6'-N-X-Antibiotic Mu-4,
• 6'-N-X-Antibiotic Mu-5, and
• the 5-epi-, 5-epi-amino-5-deoxy-, and the 5-epi-azido-5-deoxy- analogs of the following:
• 6'-N-X-gentamicin C.sub.1a
• 6'-N-X-gentamicin B,
• 6'-n-x-antibiotic JI-20A,
• 6'-n-x-antibiotic 66-40B,
• 6'-n-x-antibiotic 66-40D, and
• 6'-N-X-sisomicin,
• wherein X is a substituent selected from the group consisting of alkyl, cycloalkylalkyl, alkenyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, aminohydroxyalkyl and alkylaminohydroxyalkyl, said substituent having two to eight carbon atoms, the carbon in said substituent adjacent to the aminoglycoside nitrogen being primary or secondary and unsubstituted by hydroxyl or amino functions, and when said substituent is substituted by both hydroxyl and amino functions only one of said functions can be attached at any one carbon atom;
• and the pharmaceutically acceptable acid addition salts thereof.

A pharmaceutical composition comprising an antibacterially effective amount of a compound selected from the group consisting of

• 6'-N-X-sisomicin,
• 6'-N-X-Antibiotic 66-40B,
• 6'-n-x-antibiotic 66-40D,
• 6'-n-x-antibiotic Mu-1,
• 6'-N-X-Antibiotic Mu-2,
• 6'-N-X-Antibiotic Mu-4,
• 6'-N-X-Antibiotic Mu-5, and
• the 5-epi-, 5-epi-amino-5-deoxy-, and the 5-epi-azido-5-deoxy- analogs of the following:
• 6'-N-X-gentamicin C.sub.1a
• 6'-N-X-gentamicin B,
• 6'-n-x-antibiotic JI-20A,
• 6'-n-x-antibiotic 66-40B,
• 6'-n-x-antibiotic 66-40D, and 6'-N-X-sisomicin,
• wherein x is a substituent selected from the group consisting of alkyl, cycloalkylalkyl, alkenyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, aminohydroxyalkyl and alkylaminohydroxyalkyl, said substituent having two to eight carbon atoms, the carbon in said substituent adjacent to the aminoglycoside nitrogen being primary or secondary and unsubstituted by hydroxyl or amino functions, and when said substituent is substituted by both hydroxyl and amino functions only one of said functions can be attached at any one carbon atom;
• and the pharmaceutically acceptable acid addition salts thereof,
• together with a non-toxic pharmaceutically acceptable carrier.