Oxidative dimerizations of (E)- and (Z)-isoeugenol (2-methoxy-4-pro-penylphenol) and (E)- and (Z)-2,6-dimethoxy-4-propenylphenol
作者:Ky�sti V. Sarkanen、Adrian F. A. Wallis
DOI:10.1039/p19730001869
日期:——
(10b)(13%), (13a)(8%), and (14a)(17%). The tetrahydrofuran dimethyl ethers (13b) and (14b) were identified as the (±)-forms of the lignans galbelgin and veraguensin, respectively. Oxidation of (E)-2,6-dimethoxy-4-propenylphenol (5) with 1 equiv. of hydrogen peroxide-peroxidase or potassium ferricyanide affords a 1 : 2 mixture of isomers of 2,5-bis-(4-hydroxy-3,5-di-methoxyphenyl)-3,4-dimethyltetrahydrofuran
(E)-异丁香酚(3)与1当量的反应。过氧化物酶催化的过氧化氢生成脱氢二异丁香酚4- [2,3-二氢-7-甲氧基-3-甲基-5-(E)-丙烯基苯并呋喃-2-基] -2-甲氧基苯酚}(7a)的混合物)(65%)。苏-和赤-1-(4-羟基-3-甲氧基苯基)-2- [2-甲氧基-4-(E)-丙烯基苯氧基]丙烷-1-醇(9a)(17%)和(10a)(5 %)。和由β-5生成的2,5-双-(4-羟基-3-甲氧基苯基)-3,4-二甲基四氢呋喃的异构体(13a)(4%)和(14a)(9%)。β–O和β–β耦合。在相同条件下氧化(Z)-异丁香酚(4)产生的产物仅化合物(7),(9)和(10)的丙烯基侧链构型不同:即。(7b)(22%),(9b)(40%),(10b)(13%),(13a)(8%)和(14a)(17%)。四氢呋喃二甲醚(13b)和(14b)分别被确定为木脂素galbelgin和veraguensin的(±)形式。(E)-2