Sulfonated rice husk ash (RHA-SO3H) as an efficient and recyclable catalyst for the Friedlander synthesis of quinolinesRice husk ashSulfunated rice husk ashSolvent-free conditionsFriedlander synthesisQuinolinesSulfonated rice husk ash (RHA-SO 3 H), as a newly reported powerful solid acid catalyst,...
Shirini F, Mamaghani FM, Seddighi M (2013) Sulfonated rice husk ash (RHA-SO3H): a highly powerful and efficient solid acid catalyst for the chemoselective preparation and deprotection of 1,1-diacetates. Catal Commun 36:31-37Shirini F, Mamaghani M, Seddighi M. Sulfonated rice husk ash (...
Sulfonated rice husk ash (RHA-SO3H), a newly reported solid acid catalyst, was efficiently used for the synthesis of 4,4′-(arylmethylene)-bis-(3-methyl-1-phenyl-1H-pyrazol-5-ols), 3,3′-(arylmethylene)-bis-(4-hydroxycoumarins) and bis(indolyl)methanes. The procedure gave the ...
Friedlander synthesisQuinolinesSulfonated rice husk ash (RHA-SO3H), as a newly reported powerful solid acid catalyst, can be efficiently used for the promotion of the preparation of substituted quinoline derivatives via the condensation reaction between 2-aminoarylketones and α-methylene ketones. All...
In this work, a simple, rapid and efficient method for the preparation of benzimidazoles and quinoxalines from the condensation of o-phenylene diamines with aldehydes and/or 1,2-dicarbonyl compounds in the presence of sulfonated rice husk ash (RHA-SO3H) as an efficient green catalyst is ...
An efficient method for the synthesis of formamidine and formamide derivatives promoted by sulfonated rice husk ash (RHA-SO3H)Rice rusk ashSulfonated rice hush ashSolid acidFormamidinesFormamidesA mild, simple and efficient method has been developed for the promotion of the preparation of N,N -...
Facile synthesis of benzimidazole, benzoxazole, and benzothiazole derivatives catalyzed by sulfonated rice husk ash (RHA-SO3H) as an efficient solid acid catalystRice husk ashSulfonated rice husk ashortho estersBenzimidazoleA mild, simple, and efficient solvent-free method, with sulfonated rice husk ash...