Synthesis and characterization of two novel biological-based nano organo solid acids with urea moiety and their catalytic applications in the synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ol), coumarin-3-carboxylic acid and cinnamic acid derivatives under mild and green conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 71942-71954 ◽  
Author(s):  
Mohammad Ali Zolfigol ◽  
Roya Ayazi-Nasrabadi ◽  
Saeed Baghery

Green and straight-forward syntheses of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ol) derivatives using nano structure organocatalysts, namely 2-carbamoylhydrazine-1-sulfonic acid and carbamoylsulfamic acid, have been developed.

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