Green synthesis of dihydropyrano[3,2-c]chromene derivatives using amino-terminated PAMAM dendrimer as catalyst

d -Sorbitol-cored PAMAM dendrimer (SOR-G1) was effectively synthesized by the ring opening polymerization of epichlorohydrin. The dendrimer was characterized using different spectroscopic and analytical techniques including IR and NMR spectroscopy, TG–DTA, and GPC. Dihydropyrano[ 3,2-c ]chromene der...

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Bibliographic Details
Published in:Research on chemical intermediates 2022, Vol.48 (1), p.379-399
Main Authors: Unnikrishnan, V., Avudaiappan, G., James, Kiran, Palmurukan, M. R., Sreekumar, K.
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Catalytic activity
Chemical synthesis
Chemistry
Chemistry and Materials Science
Differential thermal analysis
Epichlorohydrin
Ethanol
Infrared spectroscopy
Inorganic Chemistry
NMR spectroscopy
Physical Chemistry
Ring opening polymerization
Sorbitol
Spectrum analysis
Thermal stability
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Summary:d -Sorbitol-cored PAMAM dendrimer (SOR-G1) was effectively synthesized by the ring opening polymerization of epichlorohydrin. The dendrimer was characterized using different spectroscopic and analytical techniques including IR and NMR spectroscopy, TG–DTA, and GPC. Dihydropyrano[ 3,2-c ]chromene derivatives were synthesized using SOR-G1 as a catalyst, and it was synthesized within 30 min in ethanol/water medium and excellent yield was obtained. SOR-G1 acted as a good base catalyst on the basis of amine capacity and good thermal stability. The prepared dihydropyrano[ 3,2-c ]chromene derivatives were characterized using GCMS, LCMS, IR, 1 H NMR, and 13 C NMR spectra. The catalyst could be reused up to three reaction cycles without losing its catalytic activity. Graphic abstract
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-021-04590-9