Ubiquinone and related compounds. XXXI. Synthesis of urinary metabolites of ubiquinone, phylloquinone, .ALPHA.-tocopherol and their related compounds.
作者:MASAZUMI WATANABE、KAYOKO OKAMOTO、ISUKE IMADA、HIROSHI MORIMOTO
DOI:10.1248/cpb.26.774
日期:——
Metabolites (XVIIa, b, c) of ubiquinone, phylloquinone and α-tocopherol, and their 2', 3'-dihydro (XXa, b, c), dicarboxy (XVIa, b, XXIIIa, b, c, XXIVa, b and XXVa, b) and 3'-demethyl (XXIa, b) derivatives were synthesized. During the synthetic studies of these compounds, we found that cis-4-acetoxy-1-bromo-2-methyl-2-butene (cis-III) was more reactive to nucleophiles than the corresponding trans isomer. γ-Vinyl-γ-butyrolactone (XII), which was a useful starting material for the synthesis of XXIa, b, was synthesized in one step from 1, 3-butadiene. The 3'-methyl group of XVIIa, b was not essential for the membrane-stabilizing activity in the rat-liver lysosome. Introduction of a carboxyl but not a carboxyl ester group into XVIIa, b resulted in a loss of the stabilizing activity.
合成了泛醌、叶醌和α-生育酚的代谢物(XVIIa, b, c)及其2', 3'-二氢(XXa, b, c)、二羧基(XVIa, b, XXIIIa, b, c, XXIVa, b 和 XXVa, b)和3'-去甲基(XXIa, b)衍生物。在这些化合物的合成研究过程中,我们发现顺-4-乙氧基-1-溴-2-甲基-2-丁烯(cis-III)对核苷酸反应性比相应的反异构体更强。γ-乙烯基-γ-丁内酯(XII)作为合成XXIa, b的有用起始材料,可以一步从1, 3-丁二烯合成。XVIIa, b的3'-甲基基团对大鼠肝脏溶酶体的膜稳定活性并不是必需的。将羧基引入XVIIa, b,而不是羧酸酯基团,会导致稳定活性的丧失。