Abstract: This invention provides 4-N-acylfortimicin B derivatives of the structure ##STR1## wherein R is acyl, aminoacyl, N-monoloweralkylminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, or substituted aminoacyl of the formula ##STR2## where R.sup.1 is an acyl radical derived from an amino acid or a short peptide, and the pharmaceutically acceptable salts thereof.The compounds are useful as intermediates for preparing 4-N-alkyl or substituted alkylfortimicin B derivatives. In addition to their utility as intermediates, some of the compounds of this invention are also useful as antimicrobial agents.

Abstract: A 1,5-fortimicin B carbamate represented by the formula: ##STR1## wherein each R is hydrogen or monocyclicaryloxycarbonyl and R.sub.1 is selected from the group consisting of: loweralkyl, hydroxyloweralkyl, hydrogen, aminoloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, trihaloalkoxycarbonyl, an amino acid residue and an N-protected amino acid residue and the pharmaceutically acceptable salts thereof.

Abstract: 4-N, 2'-N and 4,2'-di-N-derivatives of fortimicins AH and AI are provided. The compounds are useful as antibacterial agents.

Abstract: 4-N-, 2'-N and 4,2'-di-N-fortimicin AO derivatives are provided by the present invention. The compounds are useful as antibacterial agents.

Abstract: 6'-Epi-fortimicin A and B derivatives represented by the formula ##STR1## wherein R.sub.1 is hydrogen or loweralkyl, R.sub.2 is hydrogen or loweralkyl and R.sub.3 is selected from the group consisting of hydrogen, loweralkyl, aminoloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, aminohydroxyloweralkyl, N-loweralkylaminohydroxyloweralkyl, hydroxyloweralkyl, acyl, aminoacyl, hydroxyacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl or an amino acid residue; the pharmaceutically acceptable salts thereof; intermediates useful in their preparation, compositions employing the compounds; and methods of using the compounds. The compounds are useful as antibiotics.

Abstract: Fortimicin AL derivatives represented by the formula: ##STR1## wherein: R and R.sub.1 are the same or different members of the group consisting of hydrogen, acyl, aminoacyl, diaminoacyl, N-loweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, loweralkyl, aminoloweralkyl, diaminoloweralkyl, hydroxyloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, N-loweralkylaminohydroxyloweralkyl, N,N-diloweralkylaminohydroxyloweralkyl and the pharmaceutically acceptable salts thereof, with the limitation that R and R.sub.1 each cannot be hydrogen. The compounds are useful as anti-baterial agents.

Abstract: 5-Deoxyfortimicin A, 2,5-dideoxyfortimicin A and the corresponding 4-N-acyl and alkyl fortimicin B derivatives thereof, pharmaceutically acceptable salts thereof, intermediates therefor, and pharmaceutical compositions containing the compounds of this invention. The fortimicin derivatives are represented by the formula: ##STR1## wherein R is selected from the group consisting of acyl, hydroxyacyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxyacyl, hydroxy-substituted aminoacyl or an amino acid residue other than glycyl, loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-monoloweralkylaminoloweralkyl, N-N-diloweralkylaminoloweralkyl or hydroxy-substituted aminoloweralkyl; R.sub.1 is hydrogen or hydroxy; and R.sub.2 is hydrogen or hydroxy with the limitation that either R.sub.1 and R.sub.2 each are hydrogen or when only one of R.sub.1 or R.sub.2 are hydrogen, R.sub.2 is hydrogen and R.sub.1 is hydroxy and R.sub.1 and R.sub.2 both cannot be hydroxy.

Abstract: An improved method for producing the antibiotic 2-deoxyfortimicin A, the method comprising the process of producing said antibiotic directly from fortimicin A in a four step process which results in a 50-60 percent yield of product.

Abstract: Novel fortimicin antibiotics represented by the formula ##STR1## wherein R.sub.1 is loweralkyl, R.sub.2 is hydrogen or loweralkyl and R.sub.3 is selected from the group consisting of hydrogen, acyl, hydroxyacyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl or an aminoacid residue, loweralkyl, hydroxyloweralkyl, aminoloweralkyl, N-monoloweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl or hydroxy-substituted aminoloweralkyl; and the pharmaceutically acceptable salts thereof, intermediates useful in their preparation, compositions employing the compounds and methods of using the compounds.

Abstract: Novel fortimicin derivatives represented by the formula ##STR1## wherein: R is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, hydroxyacyl, an amino acid residue, loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, aminohydroxyloweralkyl, N-loweralkylaminohydroxyloweralkyl or N,N-diloweralkylaminohydroxyloweralkyl; R.sub.1 is loweralkyl, R.sub.2 is hydrogen or lower alkyl; and R.sub.3 is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, hydroxyacyl, an amino acid residue, loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, aminohydroxyloweralkyl, N-loweralkylaminohydroxyloweralkyl, N,N-diloweralkylaminohydroxyloweralkyl or hydrogen and the pharmaceutically acceptable salts thereof; pharmaceutical compositions containing the compounds; and methods of making and using the compounds.

Abstract: 2-Deoxyfortimicin A, 2-deoxy-4-N-alkyl fortimicins and 2-deoxy-4-N-acyl fortimicins represented by the formula ##STR1## wherein R is selected from the group consisting of acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, an amino acid residue, hydroxyacyl, loweralkyl, aminoloweralkyl, N-monoloweralkylaminoloweralkyl, hydroxyloweralkyl, N-N-diloweralkylaminoloweralkyl or hydroxy-substituted aminoloweralkyl, and the pharmaceutically acceptable salts thereof; intermediates therefor; and pharmaceutical compositions containing the compounds of this invention.

Abstract: This invention provides 4-N-acylfortimicin B derivatives of the structure ##STR1## wherein R is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, or substituted aminoacyl of the formula ##STR2## where R.sup.1 is an acyl radical derived from an amino acid or a short peptide, and the pharmaceutically acceptable salts thereof.The compounds are useful as intermediates for preparing 4-N-alkyl or substituted alkylfortimicin B derivatives. In addition to their utility as intermediates, some of the compounds of this invention are also useful as antimicrobial agents.

Abstract: 2'-N-Acyl and alkyl fortimicin B and fortimicin B derivatives, 4,2'-N,N'-diacyl and dialkyl derivatives, 4-N-acyl-2'-N-alkyl and 4-N-alkyl-2'-N-acyl fortimicin B derivatives represented by the formula ##STR1## wherein: R is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, hydroxyacyl, an amino acid residue, loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, aminohydroxyloweralkyl, N-loweralkylaminohydroxyloweralkyl or N,N-diloweralkylaminohydroxyloweralkyl; and R.sub.

Abstract: 3-De-O-methyl-2'-N-acyl and alkyl fortimicin B derivatives represented by the formula ##STR1## wherein R is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, hydroxyacyl, an amino acid residue, loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, aminohydroxyloweralkyl, N-loweralkylaminohydroxyloweralkyl N,N-diloweralkylaminohydroxyloweralkyl; and R.sub.1 is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, an amino acid residue, hydroxyacyl, loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, aminohydroxyloweralkyl, N-loweralkylaminohydroxyloweralkyl, N,N-diloweralkylaminohydroxyloweralkyl, hydrogen; the pharmaceutically acceptable salts thereof; pharmaceutical compositions containing the compounds; and methods of making and using the compounds. The compounds are antibiotics.

Abstract: 2'-N-Acyl and alkyl-6'-epi-fortimicin B and fortimicin B derivatives represented by the formula ##STR1## wherein: R is acyl, hydroxyacyl, aminoacyl, N-monoloweralkylamino, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, an amino acid residue, loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, aminohydroxyloweralkyl, N-loweralkylaminohydroxyloweralkyl or N,N-diloweralkylaminohydroxyloweralkyl; and R.sub.1 is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, an amino acid residue, hydroxyacyl loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, aminohydroxyloweralkyl, N-loweralkylaminohydroxyloweralkyl, N,N-diloweralkylaminohydroxyloweralkyl or hydrogen; R.sub.2 is loweralkyl; and R.sub.

Abstract: 4-N-Acyl, 2'-N-acyl and 4,2' -N,N' -diacylfortimicin E derivatives represented by the formula ##STR1## wherein R is hydrogen, acyl, aminoacyl, N-lower alkylamino acyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl or an amino acid residue; R.sub.1 is hydrogen, acyl, aminoacyl, N-loweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl or an amino acid residue, with the limitation that R cannot be hydrogen when R.sub.1 is hydrogen, and R.sub.1 cannot be hydrogen when R is hydrogen; the pharmaceutically acceptable salts thereof; intermediates therefor; pharmaceutical compositions; and methods of making and using the compounds. The compounds are useful as antibiotics.

Abstract: 2-Deoxy-2'-N-acyl and alkyl fortimicin B and derivatives, 4,2'-N,N'-diacyl and dialkyl fortimicin B derivatives, 4-N-acyl-2'-N-alkyl- and 4-N-alkyl-2'-N-acyl fortimicin B derivatives represented by the formula ##STR1## wherein R is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, hydroxyacyl, an amino acid residue, loweralkyl, aminoloweralkyl, hydroxyloweralkyl, N-loweralkylaminoloweralkyl, N,N-diloweralkylaminoloweralkyl, aminohydroxyloweralkyl, N-loweralkylaminohydroxyloweralkyl or N,N-diloweralkylaminohydroxyloweralkyl; and R.sub.

Abstract: This invention provides 4-N-acylfortimicin B derivatives of the structure ##STR1## wherein R is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, or substituted aminoacyl of the formula ##STR2## where R.sup.1 is an acyl radical derived from an amino acid or a short peptide, and the pharmaceutically acceptable salts thereof.The compounds are useful as intermediates for preparing 4-N-alkyl or substituted alkylfortimicin B derivatives. In addition to their utility as intermediates, some of the compounds of this invention are also useful as antimicrobial agents.

Abstract: This invention provides 4-N-acylfortimicin B derivatives of the structure ##STR1## wherein R is acyl, aminoacyl, N-monoloweralkylaminoacyl, N,N-diloweralkylaminoacyl, hydroxy-substituted aminoacyl, or substituted aminoacyl of the formula ##STR2## where R.sup.1 is an acyl radical derived from an amino acid or a short peptide, and the pharmaceutically acceptable salts thereof.The compounds are useful as intermediates for preparing 4-N-alkyl or substituted alkylfortimicin B derivatives. In addition to their utility as intermediates, some of the compounds of this invention are also useful as antimicrobial agents.

Abstract: A new fortimicin antibiotic, 2-deoxyfortimicin B, intermediates useful in the preparation of the compound, methods of making and using the compound and compositions containing 2-deoxyfortimicin B.