Synthesis of highly functionalized homochiral azetidines and azetidine-2-carboxylic esters
摘要:
Homochiral (2S, 3S)-3-benzyloxy-2-formyl-azetidines 2, (2S, 3S)-3-benzyloxy-2-carbomethoxy--azetidines3 and the highly strained (2S)-N-p-methoxyphenyl-2-silyloxymethyl-3-azetidinone 4 were successfully synthesized starting from diethyl-L-tartrate. The suitably functionalized azetidine ring is formed in a single synthetic operation with minimum protecting group chemistry.