Superacid-Promoted Cyclodehydration Leading to the Imidazo[2,1-<i>a</i>]isoquinoline Ring System
作者:Anila Kethe、Rajasekhar Reddy Naredla、Douglas A. Klumpp
DOI:10.1002/hlca.201200590
日期:2013.8
A series of heterocycle‐substituted acetophenones were prepared and reacted with the Brønsted superacid CF3SO3H (triflic acid=trifluoromethanesulfonic acid). Cyclodehydration provided aryl‐substituted imidazo[2,1‐a]isoquinolines and related products (28–85%, seven examples). A mechanism is proposed involving dicationic intermediates.
制备了一系列杂环取代的苯乙酮,并与Brønsted超酸CF 3 SO 3 H(三氟甲磺酸=三氟甲磺酸)反应。环脱水作用提供了芳基取代的咪唑并[2,1– a ]异喹啉和相关产品(28–85%,七个实例)。提出了一种涉及双效中间体的机制。