Aegle marmelos in heterocyclization: greener, highly efficient, one-pot three-component protocol for the synthesis of highly functionalized 4H-benzochromenes and 4H-chromenes
作者:Sachin Shinde、Shashikant Damate、Smita Morbale、Megha Patil、Suresh S. Patil
DOI:10.1039/c6ra28779d
日期:——
A facile, one-potthree-component protocol for the synthesis of 2-amino-4H-chromene derivatives has been demonstrated using Bael Fruit Extract (BFE) as a natural catalyst in a green reaction medium. This method offers a mild, efficient and highly economical protocol since the reaction proceeds in natural BFE-catalyst at room temperature under aerobic conditions with a very short reaction time (30 min)
Biocatalytic one-pot three-component synthesis of 4H-chromene derivatives in non-aqueous medium
作者:Prabhakar Shrivas、Umesh Pratap
DOI:10.1007/s11696-018-00679-5
日期:2019.5
The baker’s yeast catalyzed one-potthree-component cyclocondensation of salicylaldehyde, malononitrile or ethyl cyanoacetate, and nitroalkanes for the synthesis of substituted 2-amino-4H-chromene derivatives is presented. The highlights of the protocol is a use of a biodegradable catalyst which is inexpensive, having simple reaction conditions, in other words, at room temperature and neutral pH, good-to-excellent