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.
An efficient synthesis of highly substituted furans via the electrophilic cyclization of 1-(1-alkynyl)-cyclopropyl ketones
作者:Xian Huang、Weijun Fu、Maozhong Miao
DOI:10.1016/j.tetlet.2008.02.081
日期:2008.4
The electrophiliccyclization of 1-(1-alkynyl)-cyclopropyl ketones offers an efficient and straightforward route to highly substituted furans under extremely mild reaction conditions. Iodine, NIS, and PhSeBr have proven successful as electrophiles in this process.
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.