Highly Efficient Deprotection of N-p-Toluenesulfinyl Group of β-Branched Baylis–Hillman Adducts by Using Amberlite IR-120 (Plus) Ion-Exchange Resin
作者:Guigen Li、Sun Hee Kim、Han-Xun Wei
DOI:10.1016/s0040-4020(99)01064-9
日期:2000.1
An efficient deprotection of N-p-toluenesulfinyl group of β-branched Baylis–Hillman adducts has been developed by using Amberlite IR-120 (plus) ion-exchange resin in methanol solution at room temperature. Good to quantitative yields have been obtained for six examples. No racemization was detected under the mild conditions. This new method provides a simultaneous deprotection/purification, which has
的有效的脱保护ñ - p -toluenesulfinyl组β支化的Baylis-希尔曼加合物已经通过在室温下在甲醇溶液中使用的Amberlite IR-120(正)离子交换树脂显影。对于六个实例,已经获得了良好的定量产量。在温和条件下未检测到外消旋作用。该新方法提供了同时的脱保护/纯化,这与简化后处理的溶液相脱保护技术相比具有很大的优势。