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.
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.
Hypoiodite-catalysed oxidative homocoupling of arenols and tandem oxidation/cross-coupling of hydroquinones with arenes
作者:Muhammet Uyanik、Dai Nagata、Kazuaki Ishihara
DOI:10.1039/d1cc05171g
日期:——
We report the hypoiodite-catalyzed oxidative C–C homocoupling of arenols to biarenols or biquinones using aqueous hydrogen peroxide as an oxidant. In addition, by combining hypoiodite catalysis and lipophilic Lewis acid-assisted Brønsted acid catalysis under aqueous conditions, we achieved a tandem oxidation/cross-coupling reaction of hydroquinones with electron-rich arenes. These results highlight