Premium
Green synthesis of pyrazolopyranopyrimidinone and pyranopyrazole derivatives using porphyrin‐initiated amine‐functionalized PolyBCMO dendritic polymer as sonocatalyst
Author(s) -
Avudaiappan Govindan,
Unnimaya T. Jayaprakash,
Asha Pallikkattil,
Unnikrishnan Vettukattil,
Sreekumar Krishnapillai
Publication year - 2020
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.3765
Subject(s) - chemistry , malononitrile , amine gas treating , porphyrin , polymer chemistry , hydrazine (antidepressant) , aldehyde , catalysis , polymer , solvent , barbituric acid , organic chemistry , nuclear chemistry , chromatography
A novel porphyrin‐initiated amine‐functionalized poly‐3,3‐bis(chloromethyl)oxetane (PBCMO‐amine) dendritic polymer was effectively synthesized. Characterization using the UV‐vis, IR, NMR, PXRD, TG, and FE‐SEM spectroscopy and microscopy enabled one to assess the structural and morphological stability of the PBCMO‐amine. Its catalytic activity was studied in one‐pot four‐component solvent‐free synthesis of pyrazolopyranopyrimidinone and pyranopyrazole using aldehyde, ethylacetoacetate, hydrazine hydrate, and barbituric acid/malononitrile by simple ultrasonic irradiation. Because of the water‐soluble nature of PBCMO‐amine, the catalyst could be separated and reused without the loss of its activity.