A Convenient Modification of the Fischer Indole Synthesis with a Solid Acid
作者:Sosale Chandrasekhar、Somnath Mukherjee
DOI:10.1080/00397911.2014.984854
日期:2015.4.18
the cation exchange resin Amberlite IR 120 in refluxing ethanol. A variety of enolizable aldehydes, and ketones and several substituted phenylhydrazines could thus be converted to the corresponding indoles in excellent yields (70–88%). Reaction times were typically 6–10 h, with the resin being then filtered off and the product isolated after minimal workup. GRAPHICAL ABSTRACT
摘要 标题反应的新一锅版本包括在回流乙醇中加热羰基化合物、苯肼和阳离子交换树脂 Amberlite IR 120 的混合物。因此,各种可烯醇化的醛、酮和几种取代的苯肼可以以极好的收率(70-88%)转化为相应的吲哚。反应时间通常为 6-10 小时,然后将树脂过滤掉,并在最少的后处理后分离产物。图形概要