Lewis acid catalyzed rapid synthesis of 5-hydroxy-benzo[g]indole scaffolds by a modified Nenitzescu reaction
作者:Moyurima Borthakur、Shyamalee Gogoi、Junali Gogoi、Romesh C. Boruah
DOI:10.1016/j.tetlet.2010.07.129
日期:2010.9
A fast solvent-less synthesis of 5-hydroxy-benzo[g]indole scaffolds is accomplished from Lewis acid-catalyzed one-pot reaction of naphthoquinone, ω-morpholinoacetophenone, and urea under microwave irradiation. The key step in the synthesis is the Michael addition followed by in situ aza cyclization reaction using urea as an environmentally benign source of ammonia.
5-羟基-苯并[ g ]吲哚支架的快速无溶剂合成是通过微波辐射下路易斯酸催化的萘醌,ω-吗啉代乙酰苯和尿素的一锅反应完成的。合成中的关键步骤是迈克尔加成反应,然后使用尿素作为环境友好的氨源进行原位氮杂环化反应。