Bi(OTf)3-catalyzed conjugate addition of indoles to p-quinones: a facile synthesis of 3-indolyl quinones
作者:J.S. Yadav、B.V.S. Reddy、T. Swamy
DOI:10.1016/j.tetlet.2003.10.041
日期:2003.12
A wide range of indoles undergo conjugate addition to p-benzoquinones in the presence of 2 mol% bismuth triflate under mild conditions to afford the corresponding 3-indolyl quinones in excellent yields with high selectivity. (C) 2003 Elsevier Ltd. All rights reserved.
Abstractmagnified image The usefulness of 3‐iodoindole available for introduction of an indole unit is presented. The reaction of 3‐iodoindole with 2‐bromo(or methyl)‐1,4‐naphthoquinone in acetic acid gave 2‐bromo(or methyl)‐3‐(3‐indolyl)‐1,4‐naphthoquinone. On the other hand, the reaction of 3‐iodoindole with 2‐bromo‐1,4‐naphthoquinone in the presence of cesium carbonate in acetonitrile produced 2‐(1‐indolyl‐3‐iodo)‐1,4‐naphthoquinone. J. Heterocyclic Chem., (2010).
Green Production of Indolylquinones, Derivatives of Perezone, and Related Molecules, Promising Antineoplastic Compounds
作者:René Gerardo Escobedo-González、Héctor Pérez Martínez、Ma. Inés Nicolás-Vázquez、Joel Martínez、Gabriela Gómez、Juan Nava Serrano、Vladimir Carranza Téllez、C. L. Vargas-Requena、René Miranda Ruvalcaba
DOI:10.1155/2016/3870529
日期:——
A green approach to produce the indolyl derivatives from four natural quinones (perezone, isoperezone, menadione, and plumbagin) was performed; in this regard, a comparative study was accomplished among the typical mantle heating and three nonconventional activating modes of reaction (microwave, near-infrared, and high speed ball milling or tribochemical), under solventless conditions and using bentonitic