Reaction of 2-nitrobenzaldehydes with diethyl (diethoxyphosphinyl)succinate: a new synthesis of quinoline-2,3-dicarboxylic acid esters via their N-oxides
funcitonalized quinolines with the merits of broad substrate scope, good functional group tolerance, excellent hydrogen transfer selectivity, reusable earth-abundant metal catalyst, and operational simplicity. The developed chemistry paves the ways for further design of hydrogen transfer-mediated coupling reactions by developing heterogeneous catalysts with suitable supports.
Antibacterial activity is exhibited by 3-acylamino-2-oxoazetidines having in the 1-position an activating group of the formula ##STR1## wherein R is ##STR2## and R.sub.4 is ##STR3##
6,7-dihydroxyquinoxalines as intermediates to beta-lactam antibiotics
申请人:E. R. Squibb & Sons, Inc.
公开号:US05037983A1
公开(公告)日:1991-08-06
Compounds having the formula ##STR1## and pharmaceutically acceptable salts thereof and possessing antibacterial activiy, and intermediates to compounds of formula I having the formula ##STR2##