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Synthesis of novel carboxylated benzoxazolylcoumarins
Rodrigues, Lígia M.; X. H. Luan; Oliveira, Ana M. A. G.; Campos, Ana M. F. OliveiraSix novel coumarins containing carboxylic ester or acid groups were prepared. The compounds were characterised by the usual methods. In a few cases the fluorescence data were obtained.
Data: 2004
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Origem: RepositóriUM - Universidade do Minho
Synthesis of fluorescent 3-benzoxazol-2-yl-coumarins
X. H. Luan; Cerqueira, N. M. F. S. A.; Oliveira, Ana M. A. G.; Raposo, M. Manuela M.; Rodrigues, Lígia M.; Coelho, Paulo J.; Campos, Ana M. F. OliveiraTwelve 3-benzoxazol-2-yl-coumarins (1-3) were synthesised by reacting various ortho-aminophenols with three coumarin-3-carboxylic acids either directly or by formation of the intermediate amide. The cyclodehydrating agent was polyphosphoric acid (PPA). The compounds were characterised by spectroscopic methods. Absorption and fluorescence spectra of the compounds have also been recorded.
Data: 2002
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Origem: RepositóriUM - Universidade do Minho
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