Palladium-Catalyzed Approach for the General Synthesis of (<i>E</i>)-2-Arylmethylidene-<i>N</i>-tosylindolines and (<i>E</i>)-2-Arylmethylidene-<i>N</i>-tosyl/nosyltetrahydroquinolines: Access to 2-Substituted Indoles and Quinolines
作者:Chinmay Chowdhury、Bimolendu Das、Sanjukta Mukherjee、Basudeb Achari
DOI:10.1021/jo300458v
日期:2012.6.1
A facile and efficient method for the synthesis of (E)-2-arylmethylidene-N-tosylindolines and (E)-2-arylmethylidene-N-tosyl/nosyltetrahydroquinoline variants has been developed through palladium-catalyzed cyclocondensation of aryl iodides with readily available 1-(2-tosylaminophenyl)prop-2-yn-1-ols and their higher homologues, respectively. The proposed reaction mechanism invokes the operation of
通过钯催化的芳基碘化物的环缩合反应,已经开发出一种简便高效的合成(E)-2-芳基亚甲基-N-甲苯基吲哚啉和(E)-2-芳基亚甲基-N-甲苯磺酰基/戊基四氢喹啉衍生物的简便方法。 -(2-甲苯磺酰基氨基苯基)prop-2-yn-1-ols和它们的较高同系物。拟议的反应机制在环化过程中调用反式氨基palpalation(5 / 6- exo - dig),从而确保排他性(E)-产品中的立体化学。该方法快速,操作简单,完全具有区域和立体选择性,并且用途广泛,可以使用各种2-取代的吲哚和喹啉。该反应在多种底物上有效地进行,并以中等至优异的产率提供了相应的产物。