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Phosphoric Acid Functionalized Nanostructured Heterogeneous Catalyst for Multicomponent Synthesis of 2‐Amino‐4 H ‐chromene
Author(s) -
Kalita Priyanka,
Rani Das Doli,
Kumar Talukdar Anup
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001048
Subject(s) - catalysis , dimedone , phosphoric acid , benzaldehyde , malononitrile , aldehyde , surface modification , mesoporous material , chemistry , organic chemistry , solvent , nuclear chemistry
Functionalization of synthesized mesoporous MCM‐48 was performed using phosphoric acid via post synthesis modification method and characterized using different analytical techniques. The acidic character of the phosphoric acid modified material was enhanced compared to parent MCM‐48 as predicted from the Ammonia‐Temperature Programmed Desorption (NH 3 ‐TPD) analysis. The catalytic activity of the synthesized materials was investigated for the synthesis of 2‐amino‐4 H ‐chromene via one pot three component reaction using aldehyde, malononitrile and dimedone using ethanol as solvent at 60 °C. Moderate to good yields of the desired products were obtained with substituted benzaldehyde under the optimized reaction condition. Moreover, reusability of the catalyst was also demonstrated upto five catalytic cycles with minimal loss in catalytic activity.