Efficient microwave-assisted synthesis of ellipticine through<i>N</i>-(1,4-dimethyl-9<i>H</i>-carbazol-3-ylmethyl)-<i>N</i>- tosylaminoacetaldehyde diethyl acetal
作者:Hsueh-Yun Lee、Grace Shiahuy Chen、Chien-Shu Chen、Ji-Wang Chern
DOI:10.1002/jhet.319
日期:——
cyclization of ellipticine (1a) was dramatically improved through N‐(1,4‐dimethylcarbazol‐3‐ylmethyl)‐N‐tosylaminoacetaldehyde diethyl acetal with microwave irradiation. The overall yield of 1a starting from indole was significantly increased by 25‐fold. This new approach is superior to reported methods in yields and, reaction time, and it provides efficient access to a broad spectrum of ellipticine derivatives
玫瑰树碱(1a)的D环环化中长期存在的问题,即低产率通过N-(1,4-二甲基咔唑-3-基甲基)N-甲苯磺酰基氨基乙醛二乙缩醛的微波辐射得到了显着改善。从吲哚开始的1a的总产量显着提高了25倍。这种新方法在收率和反应时间方面均优于已报道的方法,并且可以有效地获得广泛的玫瑰树碱衍生物。J.杂环化学。(2010)。