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Three-component coupling approach for the synthesis of 4H-pyrans and pyran-annulated heterocyclic scaffolds utilizing Ag/TiO2 nano-thin films as robust recoverable catalyst

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Title Three-component coupling approach for the synthesis of 4H-pyrans and pyran-annulated heterocyclic scaffolds utilizing Ag/TiO2 nano-thin films as robust recoverable catalyst
 
Creator Sadeh, Fatemeh Noori
Lashkari, Mojtaba
Hazeri, Nourallah
Fatahpour, Maryam
Maghsoodlou, Malek Taher
Hadavi, Mohammad Saeed
Mahnaei, Sahar
 
Subject 2-Amino-3-cyano-4H-pyrans
Pyran-annulated
Aldehydes
Malononitrile
C-H-activated acidic compounds
Ag/TiO2 nano-thin film
 
Description 127-135
As a segment of ongoing surveys and with the aim of expansion of environmentally benign processes, a series of biologically varied type of substituted 2-amino-3-cyano-4H-pyrans and pyran-annulated Scaffolds have been synthesized by tandem Knoevenagel-cyclocondensation of aldehydes, malononitrile, and C-H-activated acidic compounds in aqueous ethanol in the presence of Ag/TiO2 nano-thin films as an eco-friendly, recyclable, and, robust catalyst at 60°C. The salient features of this protocol are mild reaction conditions, producing target compounds in high yields, short reaction times, high atom economy, eco-friendly catalyst, easy isolation of products and no column chromatographic separation. Also, it is observed that the catalyst is highly stable during the reaction and several reuse times without observable loss in catalytic performance.
 
Date 2021-01-12T06:58:38Z
2021-01-12T06:58:38Z
2021-01
 
Type Article
 
Identifier 0975-0983(Online); 0376-4699(Print)
http://nopr.niscair.res.in/handle/123456789/55918
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJC-B Vol.60B(01) [January 2021]