Pheromones of Pine Sawflies: Synthesis of a Pure (2S,3R)-3-Methylalkan-2-ol Stereoisomer via an Asymmetric 1,3-Dipolar Cycloaddition; Preparation of a Pheromone Component of Macrodiprion nemoralis
作者:Staffan Karlsson、Hans-Erik Högberg
DOI:10.1055/s-2000-8221
日期:——
paper presents a new approach to the preparation of enantiomerically pure (2S,3R)-3-methylalkan-2-ols, the esters of which are sex pheromones of several pine sawflies. Thus, an asymmetric 1,3-dipolar cycloaddition between a sulfur containing 1,3-dipole and a dipolarophile attached to (1R)-camphorsultam containing a vinyl ether functionality furnished a 90 : 10 diastereomeric mixture of trans-3,4-disubstituted
本文提出了一种制备对映体纯 (2S,3R)-3-methylalkan-2-ols 的新方法,其酯类是几种松叶蜂的性信息素。因此,含硫的 1,3-偶极子和连接到含有乙烯基醚官能团的 (1R)-樟脑磺胺的亲偶极试剂之间的不对称 1,3-偶极环加成反应提供了 90:10 的反式 3,4-二取代四氢噻吩的非对映异构体混合物酰胺。主要的转化为对映体纯的四氢噻吩基甲基溴,其与单烷基化二噻烷单元偶联。经雷尼镍还原(2S,3R,7R,9S)-3,7,9-trimethyltridecan-2-ol,其乙酸酯即为Macrodiprion nemoralis的引诱性信息素成分。