Switch in regioselectivity of epoxide ring-opening by changing the organometallic reagent
作者:José A. Gálvez、María D. Díaz de Villegas、Ramón Badorrey、Pilar López-Ram-de-Víu
DOI:10.1039/c1ob06216f
日期:——
The regio- and stereoselective ring-opening of a 2-(2′-oxiranyl)-1,2,3,6-tetrahydropyridine using organometallic reagents is reported. The choice of the organometallic reagent determines the formation of either 2-[(R)-1-hydroxyalkyl]- or 2-[(S)-2-hydroxy-1-alkyl]-1,2,3,6-tetrahydropyridines. The formation of 2-[(S)-2-hydroxy-1-alkyl]-1,2,3,6-tetrahydropyridines is a rare example of epoxide ring-opening
报道了使用有机金属试剂的2-(2'-环氧乙烷基)-1,2,3,6-四氢吡啶的区域和立体选择性开环。有机金属试剂的选择决定了2-[((R)-1-羟基烷基]-或2-[(S)-2-羟基-1-烷基] -1,2,3,6-四氢吡啶的形成。2-[((S)-2-羟基-1-烷基] -1,2,3,6-四氢吡啶的形成是环氧化物开环并保留构型的罕见例子。的方法已被应用到β的不对称合成- (+) - conhydrine和(2正式合成小号,2' - [R ) -赤-来自普通前体的哌醋甲酯。该方法的结构多样性的扩展已经允许合成几种β-(+)-水合类似物。