Control of ring size selectivity by substrate directable RCM
作者:Bernd Schmidt、Stefan Nave
DOI:10.1039/b604359c
日期:——
Hydroxy groups may exert strong catalyst-directing effects in olefin metathesis reactions, which are exploited for a ring size-selective RCM reaction.
羟基可在烯烃偏聚反应中发挥强大的催化剂导向作用,这种作用可用于环尺寸选择性 RCM 反应。
Synthesis of Dihydrofurans and Dihydropyrans with Unsaturated Side Chains Based on Ring Size-Selective Ring-Closing Metathesis
作者:Bernd Schmidt、Stefan Nave
DOI:10.1002/adsc.200600473
日期:2007.1.8
Enantiomerically pure 1,5-hexadiene-3,4-diol, derived from D-mannitol in a few steps, may serve as a starting material for enantiopure dihydropyrans and dihydrofurans bearing an unsaturated side chain which is amenable for further synthetic transformations. The synthesis relies on a ring size-selective ring-closing metathesis reaction of a triene. Most likely, a catalyst-directing effect of an allylic