Ubiquinone and Related Compounds. XXVII. Synthesis of Urinary Metabolites of Phylloquinone and α-Tocopherol
作者:MASAZUMI WATANABE、MITSURU KAWADA、MASAO NISHIKAWA、ISUKE IMADA、HIROSHI MORIMOTO
DOI:10.1248/cpb.22.566
日期:——
The syntheses of the metabolites of phylloquinone, α-tocopherol and ubiquinones are described. 1. 2, 3, 5-Trimethyl-6-(3'-carboxybutyl)-1, 4-benzoquinone (VIIa), 2-methyl-3-(3'-carboxybutyl)-1, 4-naphthoquinone (VIIb) and 2, 3-dimethoxy-5-methyl-6-(3'-carboxybutyl)-1, 4-benzoquinone (VIIc) were synthesized by two routes. 2, 3, 5-Trimethylphenol (Ia) and 3-methyl-1-naphthol (Ib) were condensed with methylsuccinic anhydride (II), followed by reduction of the carbonyl groups and oxidation of the phenols to quinones (VIIa, VIIb). 2, 3, 5-Trimethyl-1, 4-benzoquinone (XVIIIa), 2-methyl-1, 4-naphthoquinone (XVIIIb) and 2, 3-dimethoxy-5-methyl-1, 4-benzoquinone (XVIIIc) were treated with γ, γ'-dimethoxy-carbonylvaleryl peroxide (XVII) on one step to give the esters (VIIIa, VIIIb, VIIIc) of these quinones. 2. 2, 3, 5-Trimethyl-6-(5'-carboxy-3'-methyl-2'-pentenyl)-1, 4-benzoquinone (XXVa), 2-methyl-3-(5'-carboxy-3'-methyl-2'-pentenyl)-1, 4-naphthoquinone (XXVb) and 2, 3-dimethoxy-5-methyl-6-(5'-carboxy-3'-methyl-2'-pentenyl)-1, 4-benzoquinone (XXVc) were synthesized by boron trifluoride-catalyzed condensation of 2, 3, 5-trimethyl-1, 4-benzohydroquinone (XXIIIa), 2-methyl-1, 4-naphthohydroquinone derivatives (XXIIIb, XXVII, XXVIII) and 2, 3-dimethoxy-5-methyl-1, 4-benzohydroquinone (XXIIIc) with methyl ε-hydroxy-γ-methyl-γ-hexenoate (XX) or methyl γ-hydroxy-γ-vinylvalerate (XXII), followed by hydrolysis of the esters to carboxylic acids and subsequent oxidation of the hydroquinones to quinones.
描述了叶绿醌、α-生育酚和醌类化合物的代谢物的合成。1. 2, 3, 5-三甲基-6-(3'-羧基丁基)-1, 4-苯醌 (VIIa)、2-甲基-3-(3'-羧基丁基)-1, 4-萘醌 (VIIb) 和2, 3-二甲氧基-5-甲基-6-(3'-羧基丁基)-1, 4-苯醌 (VIIc) 通过两条途径合成。2, 3, 5-三甲基酚 (Ia) 和3-甲基-1-萘醇 (Ib) 与乙基琥珀酸酐 (II) 进行缩合,随后还原羰基基团并将酚氧化为醌 (VIIa, VIIb)。2, 3, 5-三甲基-1, 4-苯醌 (XVIIIa)、2-甲基-1, 4-萘醌 (XVIIIb) 和2, 3-二甲氧基-5-甲基-1, 4-苯醌 (XVIIIc) 在一步中与γ, γ'-二甲氧基-羰基戊酰过氧化物 (XVII) 处理,生成这些醌的酯 (VIIIa, VIIIb, VIIIc)。2. 2, 3, 5-三甲基-6-(5'-羧基-3'-甲基-2'-戊烯基)-1, 4-苯醌 (XXVa)、2-甲基-3-(5'-羧基-3'-甲基-2'-戊烯基)-1, 4-萘醌 (XXVb) 和2, 3-二甲氧基-5-甲基-6-(5'-羧基-3'-甲基-2'-戊烯基)-1, 4-苯醌 (XXVc) 通过三氟化硼催化的缩合反应合成,反应物包括2, 3, 5-三甲基-1, 4-苯醌醇 (XXIIIa)、2-甲基-1, 4-萘醌醇衍生物 (XXIIIb, XXVII, XXVIII) 和2, 3-二甲氧基-5-甲基-1, 4-苯醌醇 (XXIIIc) 与甲基ε-羟基-γ-甲基-γ-己烯酸酯 (XX) 或甲基γ-羟基-γ-乙烯基戊酸酯 (XXII) 反应,随后对酯进行水解生成羧酸,再将醌醇氧化为醌。