Multicomponent assembling of salicylaldehydes, malononitrile, and 4-hydroxy-6-methyl-2H-pyran-2-one: A fast and efficient approach to medicinally relevant 2-amino-4H-chromene scaffold
作者:Anatoly N. Vereshchagin、Michail N. Elinson、Fedor V. Ryzhkov、Ruslan F. Nasybullin、Sergey I. Bobrovsky、Alexander S. Goloveshkin、Mikhail P. Egorov
DOI:10.1016/j.crci.2015.02.005
日期:2015.12
Abstract A new multicomponent reaction (MCR) was found: a sodium acetate-catalyzed transformation of salicylaldehydes, malononitrile and 4-hydroxy-6-methyl-2H-pyran-2-one in ethanol results in the fast (30 min) and efficient formation of new 4-pyrano-substituted 2-amino-4H-chromenes in 86–96% yields. The same transformation initiated by grinding in mortar in the presence of sodium acetate or potassium