Wd. Detlefsen et Bp. Branchaud, ATTACHMENT OF A STYRYL GROUP TO THE 6-POSITION OF A PROTECTED PENICILLANIC ACID VIA COBALOXIME-MEDIATED RADICAL ALKYL-ALKENYL CROSS-COUPLING, Bioorganic & medicinal chemistry letters, 6(19), 1996, pp. 2289-2292
Cobaloxime-catalyzed cross coupling of styrene with 6 alpha-bromopenic
illanic acid pivalolyloxymethyl ester (4) introduces a styryl group in
to the 6 position of the penicillanic acid nucleus. The method should
be capable of introducing a variety of aryl-substituted alkenes into t
he 6 position. Such compounds may be useful as novel beta-lactam antib
iotics/beta-lactamase inhibitors. Copyright (C) 1996 Elsevier Science
Ltd