Synthesis of (4R,5R)-muricatacin and its (4R,5S)-analog by sequential use of the photo-induced rearrangement of epoxy diazomethyl ketones
作者:Marcel P.M. van Aar、Lambertus Thijs、Binne Zwanenburg
DOI:10.1016/0040-4020(95)00670-4
日期:1995.10
The naturally occurring δ-hydroxy-γ-lactone (4R,5R)-muricatacin and its nonnatural (4R,5S)-analog are synthesized. The starting achiral allylic alcohols are converted into α,β-epoxy diazomethyl ketones followed by a stereospecific irradiation reaction of these compounds to give 4-hydroxy-2-alkene esters. Using this method in a sequential manner a successive introduction of stereogenic centers is realized
合成了天然存在的δ-羟基-γ-内酯(4R,5R)-多卡他霉素及其非天然(4R,5S)-类似物。起始的非手性烯丙基醇被转化为α,β-环氧重氮甲基酮,随后这些化合物的立体定向辐射反应得到4-羟基-2-烯烃酯。以顺序的方式使用该方法,实现了立体异构中心的连续引入,产生了对映体纯的4,5-二羟基-2-烯烃酯。这些醇被转化为δ-羟基-γ-内酯Muricatacin。