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.
Unexpected Formation of (<i>E</i>)-4-Alkene 1,3-Diketones from the Three-Component Reaction of Lithium Selenolates with 1-(1-Alkynyl)cyclopropyl Ketones and Aldehydes
作者:Jianfeng Xu、Luling Wu、Xian Huang
DOI:10.1021/jo2005439
日期:2011.7.15
A novel three-component stereoselective synthesis of (E)-4-alkene 1,3-diketones from lithium selenolates, 1-(1-alkynyl)cyclopropylketones, and aldehydes is reported. This reaction afforded the products in moderate to good yields with the formation of a new C–Se single bond, a new C–C double bond, and a new C–O double bond.