Enantioselective synthesis of (R)- and (S)-4-[(methoxycarbonyl)-methyl]-2-azetidinones from D-glyceraldehyde acetonide
作者:Hiroshi Matsunaga、Tomoko Sakamaki、Hiroto Nagaoka、Yasuji Yamada
DOI:10.1016/s0040-4039(00)88082-x
日期:1983.1
(R)-N-Benzyl-4-[(methoxycarbonyl)methyl]-2-azetidinone (10) and (S)-4-[(methylcarbonyl)methyl]-2-azetidinone (17) were enantioselectively synthesized from the benzylamino ester 3, which was prepared by the highly stereoselective 1,4-addition of benzylamine to the α,β-unsaturated ester 2 derived from D-glyceraldehyde acetonide (1).
由苄基氨基酯对映选择性地合成(R)-N-苄基-4-[(甲氧基羰基)甲基] -2-氮杂环丁酮(10)和(S)-4-[(甲基羰基甲基)]-2-氮杂环丁酮(17)。如图3所示,其是通过将苄胺高度立体选择性地1,4-加成到衍生自D-甘油醛丙酮化物(1)的α,β-不饱和酯2上而制备的。