Vinyl Ketones to Allenes: Preparation of 1,3-Dien-2-yl Triflates and Their Application in Pd-Catalyzed Reactions with Soft Nucleophiles
作者:Masamichi Ogasawara、Yonghui Ge、Koichi Uetake、Tamotsu Takahashi
DOI:10.1021/ol052426u
日期:2005.12.1
[chemical reaction: see text]. A general route of converting alkenyl ketones to functionalized allenes was developed. Substituted 1,3-dien-2-yl triflates, which were prepared from the alkenyl ketones via silyl dienol ethers, were excellent substrates for the palladium-catalyzed reaction with soft nucleophiles giving the multisubstituted allenes in high yields. Comparison between the dienyl triflates and
[化学反应:见正文]。开发了将烯基酮转化为官能化的烯的一般路线。由烯基酮经甲硅烷基二烯醇醚制备的1,3-二烯-2-基三氟甲磺酸酯是钯与软亲核试剂催化反应的极佳底物,可高收率得到多取代的烯。还研究了在Pd催化的反应中二烯基三氟甲磺酸酯和类似溴代亚胺之间的比较。