摘要:
Compounds of the formula: ##STR1## are disclosed, wherein R.sub.1 taken independently is hydrogen; R.sub.2 taken independently is the moiety ##STR2## wherein Ac is carboxacyl or an acyl group of formula: ##STR3## wherein Z is hydrogen, lower alkyl or a protective group removable by hydrogenolysis; R.sub.5 is lower alkyl; R.sub.1 and R.sub.2 when together are the divalent group; ##STR4## wherein Z and R.sub.5 are as defined above; R.sub.3 is hydrogen when R.sub.1 and R.sub.2 are taken together and is a monovalent thio group of formula: ##STR5## located in the 7(S)-position when R.sub.1 and R.sub.2 are taken independently, A represents hydrogen or hydroxyl, B represents hydrogen or hydroxyalkyl, n is the integer 0 when B is hydroxyalkyl and n is an integer of 0 to 1, inclusive, when B is hydrogen, X is oxygen .[.or sulfur.]., D is the acyl radical of a lower hydrocarbon carboxylic acid; R.sub.4 is lower alkyl and Y is carboxacyl or hydrogen.Disclosed also are methods of making and using the novel compounds of the invention, which are useful intermediates in the chemical synthesis of useful antibacterial lincomycin analogs. Certain of the compounds of the invention are also active as antibacterial agents.
摘要:
LOCATED IN THE 7(S)-position when R1 and R2 are taken independently, A represents hydrogen or hydroxyl, B represents hydrogen or hydroxyalkyl, n is the integer 0 when B is hydroxyalkyl and n is an integer of 0 to 1, inclusive, when B is hydrogen, X is oxygen or sulfur, D is the acyl radical of a lower hydrocarbon carboxylic acid; R4 is lower alkyl and Y is carboxacyl or hydrogen. Disclosed also are methods of making and using the novel compounds of the invention, which are useful intermediates in the chemical synthesis of useful antibacterial lincomycin analogs. Certain of the compounds of the invention are also active as antibacterial agents.
WHEREIN Z and R5 are as defined above; R3 is hydrogen when R1 and R2 are taken together and is a monovalent thio group of formula:
WHEREIN Z is hydrogen, lower alkyl or a protective group removable by hydrogenolysis; R5 is lower alkyl; R1 and R2 when together are the divalent group;
WHEREIN Ac is carboxacyl or an acyl group of formula:
ARE DISCLOSED, WHEREIN R1 taken independently is hydrogen; R2 taken independently is the moiety
摘要:
Processes for the synthesis of the Factor Xa anticoagulent Fondaparinux, and related compounds are described. Also described are protected pentasaccharide intermediates as well as efficient and scalable processes for the industrial scale production of Fondaparinux sodium by conversion of the protected pentasaccharide intermediates via a sequence of deprotection and sulfonation reactions.
摘要:
Hexose derivatives are described which facilitate control over the stereochemistry of the glycosyl bond formed in the course of a solid phase glycosylation reaction. Methods for their use are also described.
摘要:
Compounds of formulae ##STR1## wherein X is O;R.sup.1 is OH, phosphate, diphosphate, triphosphate or (CH.sub.2).sub.n --O--CH.sub.2 --O--P(.dbd.O)(OH).sub.2 wherein n is 0-2;R.sup.2 is H and R.sup.3 is CH.sub.3, CH.sub.2 OH, CH.sub.2 --O--CH.sub.3, CH.sub.2 SH, CH.sub.2 F or CH.sub.2 N.sub.3 ; orR3 is H and R.sup.2 is CH.sub.3, CH.sub.2 OH, CH.sub.2 --O--CH.sub.3, CH.sub.2 SH, CH.sub.2 F or CH.sub.2 N.sub.3 ;and Z is Cl, Br, I, acyloxy or alkoxy;are synthesized from acyclic intermediates and are subsequently useful in the preparation of nucleoside analogues with antiviral activity against retroviruses such as HIV and hepatitis B.
摘要:
Mono-, di- and tri-adamantylcarbonyl- digalactopyranosyl- glucopyranosyl- fructofuranose sulfate salts, useful as complement inhibitors and the process of making such compounds.
摘要:
Novel useful analogs of the well known antibiotics lincomycin and clindamycin. These analogs are prepared by condensing a cyclic acid with a sugar amine.
摘要:
The invention disclosed herein relates to novel 1-deoxy-glycopyranosides, preferably 1-deoxy-D-mannopyranosides, having in the 1-position of the pyranoside ring an .omega.-aminoalkylthio, .omega.-aminoalkyloxy or .omega.-aminoalkanoylamino substituent; and to novel processes for preparing these 1-substituted-1-deoxy-glycopyranosides starting with the corresponding tetra-O-acetyl-glycopyranosyl bromide or amine. These .omega.-amino(alkylthio, alkyloxy or alkanoylamino)-1-deoxy-glycopyranosides, and in particular 1-[(6'-aminohexyl)thio or oxy]-1-deoxy-D-mannopyranosides, possess insulin-like activity.