摘要:
C-20-Modified derivatives of the macrolide antibiotics tylosin, desmycosin, macrocin, lactenocin, 2"'-O-demethylmacrocin and 2"-O-demethyllactenocin inhibit pathogenic bacteria, especially gram-positive bacteria, Pasteurella species, and Mycoplasma species and pharmaceutical compositions thereof.
摘要:
4"- and 3-Ester derivatives of 23-demycinosyltylosin (DMT) and 23-de(mycinosyloxy)tylosin (DMOT) of the formula: ##STR1## wherein R is hydrogen, optionally substituted C.sub.1 -C.sub.5 -alkanoyl or optionally substituted benzoyl, phenylacetyl or phenoxyacetyl; R.sup.1 is hydrogen, optionally substituted C.sub.1 -C.sub.5 -alkanoyl or optionally substituted benzoyl, phenylacetyl, or phenylpropionyl; R.sup.2 is hydrogen, optionally substituted C.sub.1 -C.sub.5 -alkanoyl, or optionally substituted benzoyl, phenylacetyl, phenylpropionyl, phenoxyacetyl or phenylthioacetyl; R.sup.3 is hydrogen or R.sup.4 O--; and R.sup.4 is hydrogen or a specified acyl group provided that one of R or R.sup.2 must be other than hydrogen and that, when R.sup.1 is hydrogen, R.sup.3 is hydrogen or --OH and R.sup.2 is acetyl, R cannot be hydrogen, acetyl, n-butyryl or isovaleryl and, when R and R.sup.1 are hydrogen and R.sup.3 is hydrogen or --OH, R.sup.2 cannot be propionyl; and salts thereof are useful antibiotics or intermediates to antibiotics.
摘要:
Zinc salts are used to effect the regio-selective acylation and alkylation of the 1-amino group of 4-O-substituted-2-deoxystreptamine-containing aminoglycosides. The 1-N-substituted derivatives of apramycin, 3'-hydroxyapramycin, certain .alpha. or .beta.-(lower alkyl)aprosaminides and certain .alpha. or .beta.-(substituted lower alkyl)-aprosaminides are new. The 1-N-substituted-4-O-substituted-2-deoxystreptamine aminoglycosides produced by the process of this invention are antibacterial agents.
摘要:
Ester derivatives of 5-O-mycaminosyl tylonolide (OMT) of the formula ##STR1## wherein R and R.sup.1 are selected from hydrogen, optionally substituted C.sub.1 -C.sub.5 -alkanoyl or optionally substituted benzoyl, phenylacetyl, or phenylpropionyl; R.sup.2 is hydrogen or an acyl group selected from: ##STR2## p is 0 or 1; m and n are integers from 0 to 4; R.sup.3 is hydrogen, halo, C.sub.1 -C.sub.4 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, phenyl, C.sub.5 -C.sub.8 -cycloalkenyl, naphthyl, indenyl, tetralinyl, decalinyl, adamantyl, cinnoxacinyl, a monocyclic heterocyclic ring system comprising 3 to 8 atoms in the ring or a bicyclic heterocylic ring system comprising 6 to 11 atoms, provided that at least 1 atom of the ring system is carbon and at least 1 atom of the ring system is a heteroatom selected from O, N, and S; and wherein R.sup.3 and the connecting alkyl groups--(CH.sub.2).sub.m -- and --(CH.sub.2).sub.n -- are optionally substituted by one or two halo, methyl, ethyl, methoxy, amino, N-protected-amino, methylamino, dimethylamino, nitro, acetoxy, acetamido, azido, carbomethoxy, carboxamido, cyano, or hydroxyl groups, provided that, if the substituent is other than halo or alkyl, there can be no more than one substituent on any connecting --CH.sub.2 -- group; X is O, S, --NH--, --N(CH.sub.3)--, --C.tbd.C--, --CH.dbd.CH--, --C(CH.sub.3).dbd.CH--, --CH.dbd.C(CH.sub.3)-- or --C(CH.sub.3).dbd.C (CH.sub.3)--; R.sup.4 and R.sup.5 are C.sub.1 -C.sub.5 -alkyl or optionally substituted phenyl or benzyl; provided that at least one of R, R.sup.1 and R.sup.2 must be other than hydrogen and that, when R.sup.1 is other than hydrogen, R must also be other than hydrogen; and salts thereof; which are useful antibiotics or intermediates to antibiotics, are provided.
摘要:
Method of controlling Pasteurella infections which comprises administering to an infected or susceptible warm-blooded animal an effective amount of 5-O-mycaminosyl tylonolide or a pharmaceutically acceptable acid addition salt thereof.
摘要:
Antibiotics of the formula ##STR1## wherein R is .alpha.-3,4-di-O-methylrhamnosyl, are produced by the cultivation of Streptomyces capreolus NRRL 11429 under submerged aerobic fermentation conditions. A crude antibiotic mixture is obtained from the fermentation medium by extraction. The compounds of Formula II, III, and IV are separated from coproduced Antibiotic A201A (See U.S. Pat. No. 3,843,784) and from each other by repetitive chromatography on silica gel.