3-Substituted 2-quinolones are obtained via a novel, metal-free transannulation reaction of 2-substituted indoles with 2-nitroalkenes in polyphosphoric acid. The reaction can be used in conjunction with the Fisher indole synthesis offering a practical three-component heteroannulation methodology to produce 2-quinolones from arylhydrazines, 2-nitroalkenes and acetophenone.
3-取代的2-
喹啉是通过2-取代
吲哚与2-硝基烯烃在聚
磷酸中进行的新型无
金属跨环反应获得的。该反应可以与费舍尔
吲哚合成联用,提供了一种实用的三组分杂环闭环方法,将芳基
肼、2-硝基烯烃和
乙酰苯one转化为2-
喹啉。