Biosynthesis of the isoflavan isomucronulatol: Origin of the 2′,3′,4′-oxygenation pattern
作者:Hakim A.M. Al-Ani、Paul M. Dewick
DOI:10.1016/s0031-9422(00)80806-7
日期:1985.1
arborescens ) have demonstrated that 7-hydroxy-4′-methoxyisoflavone (formononetin), 7,3′-dihydroxy-4′-methoxyisoflavone (calycosin), 7,2′,3′-trihydroxy-4′-methoxyisoflavone (koparin) and 7,2′-dihydroxy-3′,4′-dimethoxyisoflavone are excellent precursors of (3 R )-isomucronulatol (7,2′-dihydroxy-3′,4′-dimethoxyisoflavan). 7,2′-Dihydroxy- 4′-methoxyisoflavone (2′-hydroxyformononetin) and 7-hydroxy-3′,4′-dimethoxyisoflavone
摘要 用 14 C-标记的异黄酮喂养番泻叶 (Colutea arborescens) 的幼苗和豆荚的实验表明,7-羟基-4'-甲氧基异黄酮 (formononetin)、7,3'-二羟基-4'-甲氧基异黄酮 (花萼)、 7,2',3'-三羟基-4'-甲氧基异黄酮 (koparin) 和 7,2'-二羟基-3',4'-二甲氧基异黄酮是 (3 R )-isomucronulatol (7,2'-dihydroxy- 3',4'-二甲氧基异黄烷)。然而,7,2'-二羟基-4'-甲氧基异黄酮(2'-羟基甲氧基异黄酮)和7-羟基-3',4'-二甲氧基异黄酮(cladrin)是较差的底物。因此,从芒柄花素到异木糖醇的生物合成顺序包括 3'-羟基化、2'-羟基化和 3'-O-甲基化,然后大概是 7,2'-二羟基-3',4'-二甲氧基异黄酮的立体定向还原。处理 2',3',