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Chemistry: SYNTHESIS CHARACTERIZATION OF SOME NITRO COUMARIN DERIVATIVES

 

SYNTHESIS CHARACTERIZATION OF SOME NITRO COUMARIN DERIVATIVES

Jeannette T. K. Ph. D. and Ahmed A. Hussain M. Sc. Chemistry Department, College of Science/Baghdad University -Baghdad / Iraq (2001)

Received: 22/9/2001 Accepted: 9/4/2001

ABSTRACT

This study was designed to synthesis chemically new nitrocoumarin derivatives. The principle of synthesis these compounds were to prepare coumarin derivatives in three methods: first by the reaction of O- hydroxybenzaldehyde derivatives with ethylmalonated and sodium ethoxide, second by thermal cyclization of phenol derivatives with malic acid and sulfuric acid, third by thermal cyclization of phenol derivatives with ethylacetoacetate and sulfuric acid (compounds numbered (1-10)), and then treat separately all coumarin derivatives with concentrated sulfuric and nitric acids  resulting in the formation of new nitro coumarin derivatives (11-20). The chemical structure of all prepared compounds here were

confirmed by some spectral data (U.V. , I.R. and HNMR spectroscopy) (table 1, 2 and 3).


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