作者:Yoshio Ito、Yoshikazu Kimura、Shiro Terashima
DOI:10.1246/bcsj.60.3337
日期:1987.9
The 1β-methylcarbapenem key intermediate, (3S,4S)-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-4-[(R)-1-carboxyethyl]-2-azetidinone, was prepared from (S)-methyl 3-hydroxy-2-methylpropionate by employing 1,3-dipolar cycloaddition of the chiral nitrone with benzyl crotonate as a key reaction.
1β-甲基碳青霉烯关键中间体,(3S,4S)-3-[(R)-1-(叔丁基二甲基甲硅烷氧基)乙基]-4-[(R)-1-羧乙基]-2-氮杂环丁酮,由( S)-3-羟基-2-甲基丙酸甲酯通过手性硝酮与巴豆酸苄酯的1,3-偶极环加成反应作为关键反应。