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Paper Information

Journal:   ORGANIC CHEMISTRY RESEARCH   MARCH 2016 , Volume 2 , Number 1; Page(s) 20 To 27.
 
Paper: 

EFFICIENT SOLVENT FREE SYNTHESIS OF 12-ARYL-8, 9, 10, 12-TETRAHYDROBENZO[α]- XANTHEN-11-ONES AND 3H-SPIRO[ISOBENZOFURAN-1, 9'-XANTHEN]-3-ONE DERIVATIVES USING COBALT HYDROGENSULFATE AS A GREEN, HETEROGENEOUS AND REUSABLE CATALYST

 
 
Author(s):  ESHGHI H.*, EFTEKHAR M., RAHIMIZADEH M., HASSANPOUR M., BAKAVOLI M.
 
* DEPARTMENT OF CHEMISTRY, FACULTY OF SCIENCES, FERDOWSI UNIVERSITY OF MASHHAD, MASHHAD 91775-1436, IRAN
 
Abstract: 

Cobalt hydrogensulfate is an efficient catalyst for the condensation of b-naphthol, aromatic aldehydes and 5, 5-dimethyl-1, 3-cyclohexanedione at 120oC to afford 9, 9-dimethyl-12-phenyl-8, 10, 11, 12-tetrahydro-9-H-benzo [a] xanthen-11-one derivatives in high yields. Also, polycondensation reactions of phenols with phthalic anhydride were carried out in the presence of cobalt hydrogensulphate under solvent-free conditions. Simple and convenient procedure, high conversion, reusability of catalyst, easy purification and short reaction time are the advantageous features of this method.

 
Keyword(s): COBALT HYDROGENSULFATE, HETEROGENEOUS AND REUSABLE CATALYST, XANTHENE DERIVATIVES, SOLVENT FREE
 
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