Cyclic vinylogous triflate hemiacetals as new surrogates for alkynyl aldehydes
作者:Shin Kamijo、Gregory B. Dudley
DOI:10.1016/j.tetlet.2006.06.040
日期:2006.8
Cyclic vinylogous triflate hemiacetals can serve as ‘synthetic equivalents’ for alkynyl aldehydes: treatment of a vinylogous triflate hemiacetal with excess amounts of Grignard reagents produces acyclic alkynyl alcohols in good to high yields. This transformation likely involves the Grob-type C–C bond cleaving fragmentation to form the alkynyl aldehyde in situ. Subsequent nucleophilic attack of the