A Mild and Regioselective Method for α-Bromination of β-Keto Esters and 1,3-Diketones Using Bromodimethylsulfonium Bromide (BDMS)
作者:Abu T. Khan、Md Ashif Ali、Papori Goswami、Lokman H. Choudhury
DOI:10.1021/jo061501r
日期:2006.11.1
Bromodimethylsulfonium bromide has been found to be an effective and regioselective reagent for α-monobromination of β-ketoesters and 1,3-diketones. A wide variety of β-ketoesters and 1,3-diketones undergo chemoselective α-monobromination with excellent yields at 0−5 °C or room temperature. The notable advantages of this protocol are no need of chromatographic separation, use of less hazardous reagent