Synthesis of 3-Heteraryl Coumarins as Optical Brighteners
A few 2-aryl and heterocyclic (6,7) coumarinoxazoles have been synthesised by condensing 6-amino-7-hydroxy-3-phenyl-4-methylcuomarin with aromatic and heterocyclic carboxylic acids with the aid of polyphosphoric acid.The ultraviolet, infrared, nmr, mass and fluorescence spectra of these compounds have been presented for characterisation.
Annapurna, D.,Reddy, Y. D.,Somayajulu, V. V.
p. 977 - 979
(2007/10/02)
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