Synthesis of Ketene <i>N</i>,<i>N</i>-Acetals by Copper-Catalyzed Double-Amidation of 1,1-Dibromo-1-alkenes
作者:Alexis Coste、François Couty、Gwilherm Evano
DOI:10.1021/ol901831s
日期:2009.10.1
efficient procedure for the preparation of ketene N,N-acetals by copper-catalyzed double amidation of 1,1-dibromo-1-alkenes is reported. The reaction was found to be general, and ketene aminals could be obtained in good yields when potassium phosphate in toluene was used at 80 °C. The reaction was found to proceed through a regioselective monocoupling reaction followed by dehydrobromination and hydroamidation
报道了通过铜催化的1,1-二溴-1-烯烃双酰胺化反应制备烯酮N,N-乙缩醛的有效方法。发现该反应是一般的,并且当在80℃下使用甲苯中的磷酸钾时,可以以良好的产率获得乙烯酮缩醛。发现该反应通过区域选择性单偶联反应进行,然后进行脱氢溴化和加氢酰胺化。