Química Nova | |
Flavonoids from Lonchocarpus araripensis (Leguminoseae) - isolation, unequivocal assignment of NMR signals ¹H and 13C and conformational analysis | |
Braz-Filho, Raimundo1  Monte, Francisco José Q.1  Ferreira, Daniele A.1  Lima, Almi F.1  Universidade Estadual do Norte Fluminense, Campo dos Goytacazes, Brasil1  Universidade Federal do Ceará, Fortaleza, Brasil1  | |
关键词: Lonchocarpus araripensis; Leguminosae; flavonoids; NMR data; conformational analysis.; | |
DOI : 10.5935/0100-4042.20140109 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 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】
Unknown
【 预 览 】
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RO201912050596277ZK.pdf | 973KB | download |