Mahnaz Ezzati, J. Khalafy, A. P. Marjani
Nov 23, 2017
Citations
0
Influential Citations
28
Citations
Journal
Tetrahedron
Abstract
Abstract Herein we report the syntheses of pyrazolo[3,4- b ]quinolin-5-one and pyrazolo[4′,3′:5,6]pyrido[2,3- d ]pyrimidin-5,7-dione derivatives by cyclocondensation of 1,3-diketones, 3-methyl-1-phenyl-1 H -pyrazole-5-amine and arylglyoxals, under catalyst-free conditions in H 2 O/EtOH at reflux in 65–98% and 73–96% yields respectively. This protocol provides mild reaction conditions, good to high yields, non-catalytic, simple procedures and easy isolation of products to structurally diverse tricyclic pyrazolo[3,4- b ]quinolin-5-one and pyrazolo[4′,3′:5,6]pyrido[2,3- d ]pyrimidin-5,7-dione derivatives, which may have biological and pharmacological activities.