Enantioselective synthesis of bicyclic compounds via catalytic 1,4-addition-ring closing metathesis
作者:Robert Naasz、Leggy A. Arnold、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1039/b100283j
日期:——
A novel three step asymmetric annulation procedure comprises a
tandem catalytic enantioselective 1,4-addition-allylic substitution,
Grignard addition and ring closing metathesis (RCM) sequence to provide
[6,6], [7,6], [8,6] and [6,7] bicyclic products with ee’s of
93–97% in which the size of both rings can easily be varied
independent of each other.
一种新颖的三步不对称环化程序包括一个串联催化的对映选择性1,4-加成-烯丙基取代反应、Grignard加成和环闭合复分解(RCM)序列,能够提供[6,6]、[7,6]、[8,6]和[6,7]的双环产物,光学纯度达到93%–97%,其中两个环的大小可以独立且轻松地变化。