Biosynthesis of pterocarpan, isoflavan and coumestan metabolites of Medicago sativa: The role of an isoflav-3-ene
作者:Maria Martin、Paul M. Dewick
DOI:10.1016/s0031-9422(00)91023-9
日期:1980.1
C] was not incorporated into the three phytoalexins, but was an excellent precursor of 9- O -methylcoumestrol, as also was 7,2′-dihydroxy-4′-methoxyisoflav-3-en-2-one- [Me- 14 C]. A biosynthetic pathway to coumestans via isoflav-3-enes and 3-arylcoumarins is proposed. A metabolic scheme in M. sativa interrelating eight classes of naturally occurring isoflavonoids is presented.
摘要 CUCl 2 - 和紫外线处理过的苜蓿 (Medicago sativa) 幼苗的饲养实验表明,去甲基高蝶呤 - [6a- 3 H, Me- 14 C] 被掺入到前卫醇和苜蓿中,而没有任何 3 H 标记的损失,而前卫醇- [3- 3 H, Me- 14 C] 类似地并入去甲基高翅果树碱和苜蓿中,同时保持 3 H: 14 C 的比例。因此,排除了去甲基高蝶呤和维斯特醇相互转化中的异黄酮 3-烯中间体。7,2'-二羟基-4'-甲氧基异黄酮-3-烯-[Me- 14 C] 未结合到三种植物抗毒素中,但它是 9-O-甲基香豆素的极好前体,7,2'-也是如此二羟基-4'-甲氧基异黄酮-3-en-2-one-[Me-14 C]。提出了一种通过异黄酮-3-烯和 3-芳基香豆素合成香豆素的生物合成途径。M中的代谢方案。