Iodine catalyzed synthesis of the chromene derivatives in one-pot
作者:Li Yan Zeng、Mei Fang Lv、Chun Cai
DOI:10.1016/j.cclet.2012.11.002
日期:2012.12
Iodine catalyzed one-pot reactions of salicylaldehyde and dimolecular 1H-indene-1,3(2H)-dione, barbituric acids, 4-hydroxycoumarin, or 4-hydroxy-6-methylpyran-2-one were performed and provided a rapid, convenient and general approach to synthesize the chromene derivatives. 2-(11-Oxo-10,11-dihydroindeno[1,2-b]chromen-10-yl)-1H-indene-1,3(2H)-diones P1-P4 and 10-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-3-methylpyrano[4,3-b]chromen-1(10H)-ones P8-P9 were unprecedentedly prepared and structurally identified by NMR and Mass. The confirmation of structure by single crystal X-ray crystallography is reported for P3. (C) 2012 Chun Cai. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Trifluoroethanol and liquid-assisted grinding method: a green catalytic access for multicomponent synthesis
An efficient and versatile mechanochemical route for the synthesis of chromene and isoindolo[2,1- a ]quinazoline scaffolds has been developed via a simple mortar and pestle liquid-assisted grinding method using 2,2,2-trifluoroethanol (TFE) as an efficient catalyst. The present protocol is very efficient as it offers reaction in mild reaction condition, cleaner reaction profiles, effortless work-up
通过使用2,2,2-三氟乙醇(TFE)作为简单的研钵和研杵液体辅助研磨方法,已经开发了一种用于合成色烯和异吲哚并[2,1- a ]喹唑啉支架的有效且通用的机械化学路线。 催化剂。本方案非常有效,因为它可以在温和的反应条件下提供反应,反应曲线更干净,纯化步骤轻松,纯度高,反应时间短,所需产物的收率高。