Dipotassium Hydrogen Phosphate Powder Catalyzed Conversion of Dimethyl-2-(5-bromo-2-hydroxyphenyl)-3- (triphenylphosphoranylidene)butanedioate to Methyl-6- bromo-2-oxo-2H-chromene-4-carboxylate
Corresponding Author(s) : ALI RAMAZANI
aliramazani@gmail.com
Asian Journal of Chemistry,
Vol. 19 No. 2 (2007): Vol 19 Issue 2
Abstract
Dipotassium hydrogen phosphate powder was found to catalyze conversion of dimethyl 2-(5-bromo-2-hydroxyphenyl)- 3-(triphenylphosphoranylidene)butanedioate to methyl 6-bromo-2-oxo-2H-chromene-4-carboxylate in solvent- free conditions at room temperature in fairly high yield.
Keywords
Coumarin
4-Bromophenol
Dipotasium hydrogen phosphate
Vinyltriphenylphosphonium salt
Dimethyl acetylenedicarboxylate
(1)
RAMAZANI, A.; YOUSEFI, L.; SOULDOZI, A.; NOSHIRANZADEH, N. Dipotassium Hydrogen Phosphate Powder Catalyzed Conversion of Dimethyl-2-(5-Bromo-2-Hydroxyphenyl)-3- (triphenylphosphoranylidene)butanedioate to Methyl-6- Bromo-2-Oxo-2H-Chromene-4-Carboxylate. ajc 2010, 19, 1595-1596.
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