beta-carboline derivatives via mild electrophilic amide activation, with trifluoromethanesulfonic anhydride in the presence of 2-chloropyridine, is described. Low-temperature amide activation followed by cyclodehydration upon warming provides the desired products with short overall reaction times. The successful use of nonactivated and halogenated phenethylene derived amides, N-vinyl amides, and optically active
描述了在 2-
氯吡啶存在下使用
三氟甲磺酸酐通过温和的亲电酰胺活化将各种酰胺直接转化为
异喹啉和 β-咔啉衍
生物。低温酰胺活化,然后在加热时环化脱
水,提供具有较短总反应时间的所需产物。非活化和卤化苯乙撑衍生酰胺、N-
乙烯基酰胺和光学活性底物的成功使用是值得注意的。