One-pot access to tetrahydrobenzo[<i>c</i>]carbazoles from simple ketones by using O<sub>2</sub> as an oxidant
作者:Shuvendu Saha、Modhu Sudan Maji
DOI:10.1039/c9ob02751c
日期:——
diversely functionalized carbazole frameworks starting from protecting group free 2-alkenyl indoles. The employment of easily available unactivated ketones as annulating partners, mostly unexplored for the synthesis of carbazoles, is the major highlight of this protocol. This protocol is step- and atom-economical, uses molecular oxygen as the green oxidant, and gives water as the only by-product and is amenable
证明了一种有效且操作简单的一锅布朗斯台德酸催化的级联方法,用于从保护基团游离的2-烯基吲哚开始合成功能多样的咔唑骨架。该协议的主要亮点是使用易于获得的未活化的酮作为环化伙伴,大多数未开发用于合成咔唑。该方案是分步和原子经济的,使用分子氧作为绿色氧化剂,并给出水作为唯一的副产物,并且适合不同的官能团。而且,克级合成和所得产物的下游修饰证明了该方案的合成适用性。