78833-92-8Relevant articles and documents
A Carbon-Carbon Bond Formation Reaction at the C-4 Position of a β-Lactam
Kametani, Tetsuji,Honda, Toshio,Sasaki, Junko,Terasawa, Hirofumi,Fukumoto, Keiichiro
, p. 1884 - 1887 (1981)
Upon treatment with various organolithiums, 4-acetoxyazetidin-2-one(10) afforded the corresponding carbon-displaced compounds (11),(12), and (13). 4-(3-diazo-3-ethoxycarbonyl-2-oxopropyl)azetidin-2-one (15) was also synthesised from (10) and ethyl α-diazoacetoacetate in the presence of lithium hexamethyldisilazide in one step.The diazo-compound (15) was thermally cyclised to the bicyclic keto-ester (17) in the presence of rhodium acetate.