Premium
Ag 2 Cr 2 O 7 nanoparticles: An eco‐friendly and reusable catalyst for synthesis of pyrano[ c ]chromenediones and [1,3]dioxolo[ g ]chromeneones in aqueous media at ambient temperature
Author(s) -
Ebrahimi Mitra,
Abdolmohammadi Shahrzad,
KiaKojoori Reza
Publication year - 2020
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201900488
Subject(s) - chemistry , catalysis , aryl , solvent , nanoparticle , methylene , combinatorial chemistry , reuse , nuclear chemistry , organic chemistry , chemical engineering , waste management , alkyl , engineering
An efficient and green protocol for the synthesis of 4‐aryl‐3,4‐dihydro‐2 H ,5 H ‐pyrano[3,2‐ c ]chromene‐2,5‐diones and 8‐aryl‐7,8‐dihydro‐6 H ‐[1,3]dioxolo[4,5‐ g ]chromene‐6‐ones through the Ag 2 Cr 2 O 7 nanoparticles catalyzed cyclocondensation reaction of active methylene compounds including 4‐hydroxycoumarin or 3,4‐methylenedioxyphenol, aromatic aldehydes, and meldrum's acid in water at ambient temperature was described. This method demonstrates several advantages compared with methods that are currently employed such as a mild reaction conditions, simple work‐up, good to excellent yields, avoiding toxic catalyst and hazardous solvent, and recovery and reuse of the catalyst.