Efficient Synthesis of a New Type of Baylis–Hillman Adducts and Their Stereoselective Bromination
作者:Weihui Zhong、Lingbo Jiang、Baoming Guo、Yaotiao Wu、Lingjuan Hong、Yanhui Chen
DOI:10.1080/00397910903262187
日期:2010.7.27
A new type of Baylis–Hillman adducts derived from chlorovinyl aldehydes were prepared via Vilsmeier reaction of ketones with a bis(trichloromethyl) carbonate (BTC)/DMF system to construct chlorovinyl aldehydes, followed by sonochemical Baylis–Hillman reaction under solvent-free conditions. The stereoselective bromination of these new compounds with a Br2-Ph3P system has been achieved efficiently with
通过酮与双(三氯甲基)碳酸酯(BTC)/DMF 系统的 Vilsmeier 反应构建氯乙烯醛,然后在无溶剂条件下进行声化学 Baylis-Hillman 反应,制备了一种新型的由氯乙烯醛衍生的 Baylis-Hillman 加合物。在温和的条件下,这些新化合物与 Br2-Ph3P 系统的立体选择性溴化反应已成功实现,产率从良好到极好。