摘要:
6β-(L-α-Aminoadipoyl)-2α-vinyl-2β-methylpenam-3-carboxylic acid is provided in an enzymatic process converting δ-(L-α-aminoadipoyl)-L-cysteinyl-D-γ,δ-didehydroisoleucine with isopenicillin N synthetase. The 2α-vinylpenam product is converted by known methods to the 6β-amino-2α-vinyl-2β-methylpenam-3-carboxylic acid nucleus and the latter is N-acylated to provide corresponding 6β-acylaminopenams.
摘要:
Stable crystals of diphenylmethyl 2-methyl-2-triazolyl-methylpenam-3-carboxylate, which cause substantially no decomposition or deterioration even after allowing to stand at room temperature for one year. The crystals are produced by concentrating a solution of diphenylmethyl 2-methyl-2-triazolylmethylpenam-3-carboxylate of formula (2), diluting the resulting concentrate with an acetic ester, and mixing the obtained dilution with hexane or a hexane/acetic ester mixture to crystallize diphenylmethyl 2-methyl-2-triazolylmethyl-penam-3-carboxylate wherein Ph is phenyl.
摘要:
There is disclosed a process for preparing a penicillin or cephalosporin sulfone of the formula
wherein:
R' is hydrogen or a carboxylic acid acyl residue; R 2 is hydrogen or lower alkoxy; R 3 is hydrogen, a carboxy protecting group or a salt forming group; A is
in which: R 4 is halo, lower alkyl, lower alkoxy, or -CH 2 R 6 , wherein R 6 is lower alkanoyloxy or a heterocyclic group; and R 5 is hydrogen or alkoxycarbonyloxy; comprising reacting a compound of the formula with an oxidizing agent and a catalytic amount of ruthenium tetroxide.
摘要翻译:公开了一种制备下式的青霉素或头孢菌素砜的方法:其中:R 1是氢或羧酸酰基残基; R 2是氢或低级烷氧基; 其中:R 4是卤素,低级烷基,低级烷氧基或-CH 2 R 6,其中R 3是氢,羧基保护基或成盐基; A是... 6>是低级烷酰氧基或杂环基; 和R 5是氢或烷氧基羰基氧基; 包括使式...的化合物与氧化剂和催化量的四氧化钌反应。
摘要:
Novel multi-binding compounds are disclosed that modulate enzymatic processes. The compounds of the invention comprise from 2-10 ligands covalently connected, each of said ligands being capable of binding to an enzyme, enzyme substrate or enzyme cofactor thereby modulating the biological processes/functions thereof.
摘要:
2α-Methyl-2β-(1,2,3-triazol-1-yl)methylpenam-3α-carboxylic acid derivatives are prepared by reacting a penicillanic acid sulfoxide derivative of the formula wherein R is a penicillin carboxyl protecting group, and R₁ is hydrogen or halogen, R₂ is hydrogen, lower alkyl or the like with a triazole derivative of the formula wherein R₃ and R₄ are hydrogen, trialkylsilyl, lower alkyl, lower alkoxy or the like and R₅ is hydrogen or silyl substituted with 3 groups selected from the class consisting of lower alkyl, benzyl and phenyl in a solvent.
摘要翻译:2α-甲基-2β-(1,2,3-三唑-1-基)甲基亚磺酸-3α-羧酸衍生物通过使式的青霉烷酸亚砜衍生物,其中R是青霉素羧基 R 1为氢或卤素,R 2为氢,低级烷基等与式CHEM的三唑衍生物反应,其中R 3和R 4为氢,三烷基甲硅烷基,低级烷基,低级烷氧基等,R 5为氢 或在溶剂中由选自低级烷基,苄基和苯基的3种基团取代的甲硅烷基。
摘要:
(2,3)- alpha -methylenepenam-3-carboxylic acids of the general formula their readily hydrolysable esters or salts and the hydrates of these compounds or of their esters or salts. Intermediates and processes utilized to produce these compounds. These compounds are useful as antibacterial agents.