H. Ishibashi et al., SYNTHESIS OF A CHIRAL 1-BETA-METHYLCARBAPENEM KEY INTERMEDIATE USING RADICAL CYCLIZATION OF N-VINYLIC ALPHA-BROMO AMIDES, Tetrahedron, 53(28), 1997, pp. 9611-9622
The chiral 1 beta-methylcarbapenem key intermediate 5 was synthesized
by using radical cyclization of N-vinylic alpha-bromo amide 18 as a ke
y step. (C) 1997 Elsevier Science Ltd.