Azetidinone derivatives as .beta.-lactamase inhibitors
申请人:SynPhar Laboratories, Inc.
公开号:US05994340A1
公开(公告)日:1999-11-30
New 2-oxo-1-azetidine sulfonic acid derivatives with an aminoalkyl substituted "anti" (E-isomer) oxyimino group in the acylamino substituent at the 3 position of the monobactam ring. These compounds are potent inhibitors of bacterial .beta.-lactamases. These compounds can be used in combination with .beta.-lactam antibiotics to increase the effectiveness of the .beta.-lactam antibiotics in fighting infection caused by .beta.-lactamase producing bacteria.
Highly efficient sequential N,N,C-trialkylation of α-N-acyloxyimino esters
作者:Isao Mizota、Tatsuya Maeda、Makoto Shimizu
DOI:10.1016/j.tet.2015.04.111
日期:2015.9
alpha-N-Acyloxyimino esters serve as highly efficient substrates for the N,N,C-trialkylation reaction that can introduce various patterns of nucleophiles at the imino nitrogen and carbon atoms to synthesize N,N-dialkylated and N,N,C-trialkylated a-amino esters in moderate to high yields. (C) 2015 Elsevier Ltd. All rights reserved.
US4509970A
申请人:——
公开号:US4509970A
公开(公告)日:1985-04-09
2-oxo-1-azetidine sulfonic acid derivatives as potent .beta.-lactamase
申请人:Synphar Laboratories, Inc.
公开号:US05888998A1
公开(公告)日:1999-03-30
A compound of formula (I) ##STR1## wherein R.sub.1 is selected from the group consisting of 2-thienyl, 2-furyl, 2-pyrrolyl, 1-methyl-2-pyrrolyl, 2-amino-1-thiazolyl and 5-isothiazolyl; R.sub.2 is selected from the group consisting of: ##STR2## and M is hydrogen or a pharmaceutically acceptable cation; wherein the oxyimino fragment (.dbd.N--OR.sub.2) in formula (I) is in the `anti` orientation.