CHBr3/TiCl4/Mg as an Unusual Nucleophilic CBr2 Carbenoid: Effective and Chemoselective Dibromomethylenation of Aldehydes and Ketones
作者:Yeshwant Ramchandra Bhorge、Cheng-Ta Chang、Su-Haur Chang、Tu-Hsin Yan
DOI:10.1002/ejoc.201200457
日期:2012.9
We report that instead of using CBr4, CHBr3 can serve as a highly nucleophilic dibromomethylene carbenoid in chemoselective carbonyl dibromomethylenation. Successful application of the dibromomethylenation to various carbonyl compounds such as enolizable and sterically hindered ketones by using the CHBr3/Mg/TiCl4 system highlights the weakly basic nature, extraordinary reactivity, and synthetic versatility