Bioactive Formylated Flavonoids from <i>Eugenia rigida</i>: Isolation, Synthesis, and X-ray Crystallography
作者:Mohamed A. Zaki、N. P. Dhammika Nanayakkara、Mona H. Hetta、Melissa R. Jacob、Shabana I. Khan、Rabab Mohammed、Mohamed A. Ibrahim、Volodymyr Samoylenko、Christina Coleman、Frank R. Fronczek、Daneel Ferreira、Ilias Muhammad
DOI:10.1021/acs.jnatprod.6b00474
日期:2016.9.23
Two new flavonoids, rac-6-formyl-5,7-dihydroxyflavanone (1) and 2′,6′-dihydroxy-4′-methoxy-3′-methylchalcone (2), together with five known derivatives, rac-8-formyl-5,7-dihydroxyflavanone (3), 4′,6′-dihydroxy-2′-methoxy-3′-methyldihydrochalcone (4), rac-7-hydroxy-5-methoxy-6-methylflavanone (5), 3′-formyl-2′,4′,6′-trihydroxy-5′-methyldihydrochalcone (6), and 3′-formyl-2′,4′,6′-trihydroxydihydrochalcone
两个新的类黄酮,rac -6-甲酰基-5,7-二羟基黄酮(1)和2',6'-二羟基-4'-甲氧基-3'-甲基查尔酮(2),以及五个已知的衍生物,rac -8-甲酰基-5,7-二羟基黄酮(3),4',6'-二羟基-2'-甲氧基-3'-甲基二氢查耳酮(4),rac -7-羟基-5-甲氧基-6-甲基黄酮(5),3 ' -甲酰基-2',4',6'-三羟基- 5'-methyldihydrochalcone(6),和3'-甲酰基-2',4',6'- trihydroxydihydrochalcone(7)中,从叶分离尤金尼亚刚性的。的单独的(S)-和(R)-对映体1和3,以及相应的甲酰化黄酮8(6-甲酰基-5,7-二羟基黄酮)和9(8-甲酰基-5,7-二羟基黄酮),以及2',4',6'-三羟基查耳酮(10),3'-甲酰基-2',4',6'-三羟基查耳酮(11)和相应的3'-甲酰基-2',4',6'-