Synthesis of Cyclic Alkenyl Ethers via Intramolecular Cyclization of <i>O</i>-Alkynylbenzaldehydes. Importance of Combination between CuI Catalyst and DMF
作者:Nitin T. Patil、Yoshinori Yamamoto
DOI:10.1021/jo049416b
日期:2004.7.1
remarkably general method for the synthesis of cyclic alkenyl ethersvia the Cu(I)-catalyzed intramolecular cyclization of O-alkynylbenzaldehydes has been developed. The survey of metal catalysts and solvents revealed that the combination of copper(I) iodide and DMF was the catalytic system of choice. The reaction most probably proceeds via the nucleophilic addition of alcohols 2 to O-alkynylbenzaldehydes