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