Catalyst-free visible-light-induced condensation to synthesize bis(indolyl)methanes and biological activity evaluation of them as potent human carboxylesterase 2 inhibitors
作者:Yi-Shu Zhao、Hong-Li Ruan、Xiu-Yang Wang、Chen Chen、Pei-Fang Song、Cheng-Wei Lü、Li-Wei Zou
DOI:10.1039/c9ra08593a
日期:——
A mild strategy for visible-light-induced synthesis of bis(indolyl)methanes was developed using aromatic aldehydes and indole as substrates. This reaction could be performed at room temperature under catalyst- and additive-free conditions to synthesize a series of bis(indolyl)methanes in good to excellent yields. In addition, all synthesized bis(indolyl)methanes together with β-substituted indole derivatives
Tetramethyl guanidinium chlorosulfonate as a highly efficient and recyclable organocatalyst for the preparation of bis(indolyl)methane derivatives
作者:Reddi Mohan Naidu Kalla、Johnson V. John、Huiju Park、Il Kim
DOI:10.1016/j.catcom.2014.08.003
日期:2014.12
The synthesis and characterization of a novel superbase ionic liquid, tetramethylguanidinium chlorosulfonate, are described. The guanidine ionic liquid (GIL) was characterized by FT-IR and NMR spectroscopies, and wide-angle X-ray scattering techniques, as well as thermogravimetric analysis. The GIL functions as an effective, environmentally benign, and recyclable catalyst for the synthesis of various bis(indolyl)methanes in outstanding yields (90-96%), within short reaction times; further, no chromatographic purification step for the product is required. (C) 2014 Elsevier B.V. All rights reserved.
Kapuriya, Naval; Kakadiya, Rajesh; Savant, Mahesh M., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2012, vol. 51, # 7, p. 1032 - 1038