Bismuth(III) Triflate Catalyzed Condensation of Isatin with Indoles and Pyrroles: A Facile Synthesis of 3,3-Diindolyl- and 3,3-Dipyrrolyl Oxindoles
作者:Jhillu Yadav、Basireddy SubbaReddy、Kamakolanu Gayathri、Syeda Meraj、Attaluri Prasad
DOI:10.1055/s-2006-950373
日期:——
Indoles and pyrroles undergo a rapid condensation with isatin in the presence of 2 mol% of Bi(OTf)3, under mild reaction conditions, to afford the corresponding 3,3-di(3-indolyl)- and 3,3-di(2-pyrroryl)oxindoles in excellent yields and high regioselectivity. This method is ideal for the direct introduction of indoles and pyrroles onto an isatin moiety at the 3-position.
吲哚和吡咯在2毫摩尔的Bi(OTf)3存在下,在温和反应条件下与异靛酮迅速缩合,生成相应的3,3-二(3-吲哚基)-和3,3-二(2-吡咯基)氧吲哚,产率优良且区域选择性高。该方法非常适合在3位直接将吲哚和吡咯引入到异靛酮基团上。