A novel route to optically active dihydropyrans and 3-methylenetetrahydrofurans
作者:Juma'a Al-Dulayymi、Mark S. Baird
DOI:10.1016/s0040-4039(00)95174-8
日期:1989.1
Reaction of 2-(cycloprop-1-en-1-yl)ethanol derivatives with bromine, acid or silver ion generally leads to ring expansion, either to 5,6-dihydro-2H-pyrans or to 3-methylenetetrahydrofurans.