A New Synthesis of 3-Amino-2-alkenoates. Novel Synthetic Route to Amino Sugars<i>N</i>-Benzoyl-L-daunosamine and -L-acosamine
作者:Tamejiro Hiyama、Kazuhiro Kobayashi、Kiyoharu Nishide
DOI:10.1246/bcsj.60.2127
日期:1987.6
Alkanoate esters are found to couple with various nitriles to give (Z)-3-amino-2-alkenoates in good yields with the aid of a magnesium amide prepared by the reaction of ethylmagnesium bromide and diisopropylamine. The C–C bond forming reaction was applied to (2S,3S)-2,3-(cyclohexylidenedioxy)butanenitrile and the resulting adduct was successfully converted into N-benzoyl-L-daunosamine in 41% overall
发现链烷酸酯在乙基溴化镁和二异丙胺反应制备的氨基镁的帮助下与各种腈偶联,以良好的产率得到(Z)-3-氨基-2-链烯酸酯。将 C-C 键形成反应应用于 (2S,3S)-2,3-(环己基二氧基) 丁腈,所得加合物通过一系列官能团成功转化为 N-苯甲酰基-L-道诺胺,总产率为 41%操纵;乙酰化、氢化、水解和苯甲酰化、内酯化和最终还原。通过类似的过程,(2R,3S)-2,3-(环己叉二氧基)丁腈以25%的总产率转化为N-苯甲酰基-L-acosamine。