Flavonoides de Lonchocarpus araripensis (Leguminoseae) - isolamento, atribuição inequívoca dos sinais de RMN ¹H e 13C e análise conformacional

Química Nova

Almi F. Lima²  Daniele A. Ferreira²  Francisco José Q. Monte²  Raimundo Braz-filho¹ 

[1] ,Universidade Federal do Ceará Centro de Ciências Departamento de Química Orgânica e InorgânicaFortaleza CE ,Brasil

关键词: Lonchocarpus araripensis;    Leguminosae;    flavonoids;    NMR data;    conformational analysis;   

DOI  :  10.5935/0100-4042.20140109

来源: SciELO

【 摘 要 】

In a continuing investigation for potentially bioactive natural products, flavonoids were isolated from Lonchocarpus araripensis (Leguminoseae) and identified as 3-methoxy-6-O-prenyl-6'',6''-dimethylchromene-[7,8,2'',3'']-flavone (1), 3,6-dimethoxy-6'',6''-dimethylchromene-[7,8,2'',3'']-flavone (2) and 3,5,8-trimethoxy-[6,7,2",3"]-furanoflavone (3). This is the first time compound 3 has been described. Compound 2 has been previously isolated from roots while this is the first time 1 is reported in this species. Complete NMR assignments are given for1 ,2 and 3 together with the determination of conformation for 1.

【 授权许可】

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