Palladium-Catalyzed Cross-Coupling Syntheses of Benzotriazolyl Enynes and a General Route to Enynyl Ketones and Alkynyl Ketones
作者:Alan R. Katritzky、Jiangchao Yao、Ming Qi
DOI:10.1021/jo971234c
日期:1997.11.1
conjugated enynyl ketones was developed based on a two-step procedure. First, palladium-catalyzedcross-couplingreactions of 1-(benzotriazol-1-yl)propargyl ethyl ether (3) and vinyl triflates or vinyl bromides afforded the key intermediates [1-(benzotriazol-1-yl)-1-enynyl]methyl ethyl ethers 5a-d in good yields. Then reactions of compounds 5 with primary halides gave intermediates 8, which were hydrolyzed by