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Aim To synthesize a new water-soluble Na 2(C15H8O5)(SO3) 2 and determine its structure.Method The new water-soluble apigenin sulfonated derivative was synthesized by sulfonation with concentrated sulfuric acid at 40℃for half an hour and the products were obtained in ethanol-water(V∶V =1∶1).The structure of the product was identified by IR,NMR spectrum and elemental analysis.Results and Conclusion After highly selective introduced two - SO 3 groups at C3′and C6of the substrate,the new water-soluble apigenin sulfonated derivative,sodium 5,7,4 ’-trihydroxyflavone-6,3′-sulfonate was obtained in good yield(78%) at moderate conditions.This method is an ideal synthesis way because of its simple operation,mild reaction conditions,high selectivity,easy separation of the product and higher yield.
Aim To synthesize a new water-soluble Na 2 (C15H8O5) (SO3) 2 and determine its structure. Method The new water-soluble apigenin sulfonated derivative was synthesized by sulfonation with concentrated sulfuric acid at 40 ° C for half an hour and the products were obtained in ethanol-water (V: V = 1: 1). The structure of the product was identified by IR, NMR spectrum and elemental analysis. Results and Conclusion After highly selective introduced two-SO 3 groups at C3’and C6 of the substrate , the new water-soluble apigenin sulfonated derivative, sodium 5,7,4 ’-trihydroxyflavone-6,3’-sulfonate was obtained in good yield (78%) at moderate conditions. This method is an ideal synthesis way because of its simple operation, mild reaction conditions, high selectivity, easy separation of the product and higher yield.