Chemoselective synthesis of tetrasubstituted furans via intramolecular Wittig reactions: mechanism and theoretical analysis
作者:Yu-Ting Lee、Yen-Te Lee、Chia-Jui Lee、Chia-Ning Sheu、Bo-Yu Lin、Jeng-Han Wang、Wenwei Lin
DOI:10.1039/c3ob40858b
日期:——
An efficientsynthesis of tetrasubstitutedfurans was achieved from the corresponding α,β-unsaturated ketone derivatives, acid chlorides, and Bu3P in the presence of Et3N via a chemoselective intramolecular Wittig reaction as the key step. The presence of an additional electron-withdrawing group in the α-position of Michael acceptors controlled the chemoselectivities of presumable phosphorus ylides