Eight Schiff base compounds were prepared by condensation of 1-amino-2-propanol with different benzaldehydes in water. One of the Schiff bases, (z)-N-bezylidene-2-hydroxypropane-1-amine (HL1), was used as a bidentate ligand for preparation of a zirconium complex (Zr(L1)2Cl2). The complex has been used as a catalyst for efficient synthesis of wide variety of indole derivatives in EtOH under mild conditions. The turnover number and reusability of the catalyst indicate that it has high efficiency and is fairly stable under the reaction conditions.
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
A green method for the synthesis of bis-indolylmethanes and 3,3′-indolyloxindole derivatives using cellulose sulfuric acid under solvent-free conditions
ethanes, bis-1-methylindolylmethanes and 3,3′-diindolyloxindole derivatives from the reaction of indoles with various aldehydes and ketones in the presence of cellulose sulfuricacid under solvent-free conditions is reported. The significant features of this procedure are high yields of the products, mild reaction, solvent-free condition and non-toxicity of the catalyst.
p-sulfonic acid calix[4]arene: An efficient reusable organocatalyst for the synthesis of bis(indolyl)methanes derivatives in water and under solvent-free conditions
Résumé In this work, a green, simple and highly efficient procedure for the synthesis of bis(indolyl)methanes is described. The condensation of indoles catalyzed by p-sulfonic acid calix[4]arene in water and under solvent-free conditions afford the title compounds in high yields and relatively short reaction times.
The study presents a streamlined procedure for synthesizing bis(indolyl)methanederivatives using decanoic acid as a promoting medium. The reactions involve the addition of 2-methyl-1H-indole with different aromatic aldehydes at room temperature for 24 h. Decanoic acid is effective for enhancing the reactivity of aromatic aldehydes through electrophilic activation. The new synthetic method yields pure