Chemoselective synthesis of highly substituted 1,2-allenyl ketones, furans, and 2-alkynyl ketones from reaction of lithium selenolates with 1-(1-alkynyl)cyclopropyl ketones and electrophiles
作者:Jianfeng Xu、Shugao Zhu、Luling Wu、Xian Huang
DOI:10.1039/c2ob25071c
日期:——
A homo-Michael addition reaction of lithium selenolates with 1-(1-alkynyl)cyclopropyl ketones and the subsequent reaction with electrophiles such as PhSeBr, NFSI and NCS is reported. Based on the nature of electrophiles, this reaction may afford highly substituted 1,2-allenyl ketones or furans (E+ = PhSe+) and 2-alkynyl ketones (E+ = F+, Cl+, active halides) as the final products, respectively.
报道了硒酸锂与1-(1-炔基)环丙基酮的均一迈克尔加成反应,以及随后与亲电试剂如PhSeBr,NFSI和NCS的反应。根据亲电试剂的性质,该反应可提供高度取代的1,2-烯基酮或呋喃(E + = PhSe +)和2-炔基酮(E + = F +,Cl +,活性卤化物)作为最终产物, 分别。