Quimica 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.2  Lima, Almi F.2  Ferreira, Daniele A.2  | |
[1] Universidade Estadual do Norte Fluminense, Campo dos Goytacazes, Brasil;Universidade Federal do Ceará, Fortaleza, Brasil | |
关键词: Lonchocarpus araripensis; Leguminosae; flavonoids; NMR data; conformationalanalysis.; | |
DOI : 10.5935/0100-4042.20140109 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
In a continuinginvestigation for potentially bioactive natural products, flavonoids were isolatedfrom 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 beenpreviously isolated from roots while this is the first time 1 is reported inthis species. Complete NMR assignments are given for1 ,2 and 3 together withthe determination of conformation for 1.
【 授权许可】
CC BY
【 预 览 】
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