摘要:
The compounds of the present invention are prepared directly or indirectly by modifying the compounds that are naturally produced from Saccharopolyspora spinosa. The compounds of the invention have been shown to have activity against insects and mites. The compounds are prepared by modifying the rhamnose sugar, modification of the forosamine sugar, or starting with pseuodoaglycone and then replacement with a nonsugar derivative or different sugar, modification of the 5,6,5-tricyclic and 12-membered macrocyclic lactone part of the compounds naturally produced or of the pseudoaglycone of the natural compounds.
摘要:
Three new groups of 9-N-substituted derivatives of erythromycylamine with superior oral activity against Gram-positive pathogens, new processes for preparing derivatives of erythromycylamine and aliphatic aldehydes by controlling the pH of the reaction and by catalytic hydrogenation, and pharmaceutical compositions and methods using the new compounds are provided.
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:
C-20- and C-23-Modified macrolide derivatives of demycinosyltylocin (DMT), 5-O-mycaminosyltylonolide (OMT) 23-de(mycinosyloxy)tylosin, 23-deoxy-OMT, 20-dihydro-20-deoxy-DMT and 20-dihydro-20-deoxy-OMT are useful antibiotics or intermediates to antibiotics.
摘要:
C-23-Modified derivatives of demycinosyltylosin (DMT) of the formula: ##STR1## wherein R is iodo, bromo, chloro, fluoro, --S--R.sup.4, azido, --NHR.sup.5, pyridinium or --OSO.sub.2 CF.sub.3 ;R.sup.1 is hydrogen, optionally substituted C.sub.1 -C.sub.5 -alkanoyl or optionally substituted benzoyl, phenylacetyl, phenylpropionyl, phenoxyacetyl or phenylthioacetyl;R.sup.2 is hydrogen, optionally substituted C.sub.1 -C.sub.5 -alkanoyl or optionally substituted benzoyl, phenylacetyl or phenylpropionyl;R.sup.3 is hydrogen, optionally substituted C.sub.1 -C.sub.5 -alkanoyl or optionally substituted benzoyl, phenylacetyl or phenoxyacetyl;R.sup.4 is hydrogen, optionally substituted C.sub.1 -C.sub.6 -alkyl, cyclohexyl, C.sub.1 -C.sub.5 -alkanoyl, optionally substituted phenyl or benzyl, or an optionally substituted heteroaryl group selected from imidazolyl, pyrazolyl, pyridyl, pyrimidyl, pyrazinyl, pyridazinyl, triazinyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, thienyl and furanyl; andR.sup.5 is hydrogen or an acyl group selected from optionally substituted C.sub.1 -C.sub.5 -alkanoyl or optionally substituted benzoyl, phenylacetyl or phenylpropionyl;and salts thereof are useful antibiotics or intermediates to antibiotics.
摘要:
Apramycin derivatives substituted at the 4"-amino group with a variety of substituents are broad spectrum antibiotics. Also claimed are intermediates in the synthesis of these apramycin derivatives.
摘要:
Novel ring-contracted macrolides which enhance gastrointestinal motility and novel methods and compositions for treating gtastrointestinal disorders in animals with these macrolides and with certain other previously known ring-contracted macrolides are provided.
摘要:
New 3'" and/or 4'"-modified macrocin and 3" and/or 4"-modified-lactenocin derivatives of formula 1 have significant antibacterial activity. Compositions positions containing and methods of using these derivatives are also provided.
摘要:
Nickel salts are used to effect the regio-selective acylation and alkylation of the 2'-amino group of 4-O-substituted-2-deoxystreptamine containing aminoglycosides. The 2'-N-substituted derivatives of apramycin, certain .alpha. or .beta.-(lower alkyl)aprosaminides and certain .alpha. or .beta.-(substituted lower alkyl)aprosaminides are new. The 2'-N-substituted-4-O-substituted-2-deoxystreptamine aminoglycosides produced by the process of this invention are antibacterial agents.