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.
Bismuth triflate catalyzed conjugate addition of indoles to α,β-enones
Reaction of indoles with electron deficient olefins under the influence of bismuth triflate has been studied at ambient temperature and affords the corresponding 3-alkylated indoles in excellent yields. (C) 2003 Elsevier Ltd. All rights reserved.
InBr<sub>3</sub>-Catalyzed Conjugate Addition of Indoles to <i>p</i>-Quinones: An Efficient Synthesis of 3-Indolylquinones
作者:J. Yadav、B. Reddy、T. Swamy
DOI:10.1055/s-2003-44364
日期:——
Indium(III) bromide catalyzes efficiently the conjugate addition of indoles to p-benzoquinones under mild conditions to afford the corresponding 3-indolylquinones in high yields with high selectivity. 1,4-Naphthoquinones also underwent Michael addition with indoles under similar conditions to give 3-indolylnaphthoquinones.