IntroductionIn the past several years,much research workhasbeen done forthesynthesisof C- fused bicyclo- β-lactam compounds and a concise“Double Annula-tion”procedure has been developed.Theβ- lactamring is formed by the classical Staudinger reac-tion[ IntroductionIn the past several years, much research workhasbeen done forthesynthesisof C-fused bicyclo- beta-lactam compounds and a concise “Double Annula- tion” procedure has been developed. The beta- lactamring is formed by the classical Staudinger reac- tion [