Efficient Synthesis of Functionalized Furans via Ruthenium-Catalyzed Cyclization of Epoxyalkyne Derivatives
作者:Ching-Yu Lo、Hongyun Guo、Jian-Jou Lian、Fwu-Ming Shen、Rai-Shung Liu
DOI:10.1021/jo020004h
日期:2002.5.1
Ruthenium catalyst TpRuPPh(3)(CH(3)CN)(2)Cl is found to effect the cyclization of epoxyalkynes to furans in the presence of Et(3)N. The reactions worked well for various epoxyalkynes with suitable oxygen and nitrogen functionalities with low loading of catalyst. It failed with disubstituted epoxyalkynes. The mechanism was elucidated by a deuterium labeling experiment that suggested that the mechanism