A FACILE ENTRY TO 3-(1-HYDROXYETHYL)-2-AZETIDINONES FROM METHYL (<i>R</i>)-3-HYDROXYBUTANOATE BASED ON THE ESTER ENOLATE-ALDIMINE CONDENSATION
作者:Toshiyuki Chiba、Masako Nagatsuma、Takeshi Nakai
DOI:10.1246/cl.1984.1927
日期:1984.11.5
The reaction of the dianion of methyl (R)-3-hydroxybutanoate with the N-silylimine generated from trimethylsilylpropynal afforded (3R,4S)-3-[(R)-1-hydroxyethyl]-4-trimethylsilylethynyl-2-azetidinone as the major product, of which the stereochemistry was assigned through its stereospecific conversion to the (+)-4-acetoxy derivative.
(R)-3-羟基丁酸甲酯的双阴离子与由三甲基甲硅烷基丙炔醛生成的 N-甲硅烷基亚胺反应得到 (3R,4S)-3-[(R)-1-羟乙基]-4-三甲基甲硅烷基乙炔基-2-氮杂环丁酮主要产物,其立体化学通过其立体有择转化为 (+)-4-乙酰氧基衍生物指定。