stable allenyl, propargyl, or allyl-propargyl hybrid cations have been developed. These carbocations could be generated from silyl 1-(pi-donor)-substituted propargylethers by the action of trimethylsilyl trifluoromethanesulfonate in dichloromethane at -78 degrees C to room temperature and could be attacked nucleophilically by electron rich arenes, allylsilanes, or enol silyl ethers, giving rise to
A New Synthesis of Trimethylsilyl-Substituted Enyne and (Z)-Enediyne Compounds.
作者:Mitsuhiro YOSHIMATSU、Takayo FUSEYA
DOI:10.1248/cpb.44.1954
日期:——
Trimethylsilyl (TMS)-substituted enynes 9-11, 13-17 and (Z)-enediynes 18 were prepared by dehydration of the TMS-substituted propargyl alcohols 1-8 with polyphosphoric acid trimethylsilyl ester.