Hydrophobic Vitamin B<sub>12</sub>. V. Electrochemical Carbon-Skeleton Rearrangement as Catalyzed by Hydrophobic Vitamin B<sub>12</sub>: Reaction Mechanisms and Migratory Aptitude of Functional Groups
作者:Yukito Murakami、Yoshio Hisaeda、Toshiaki Ozaki、Takako Tashiro、Teruhisa Ohno、Yutaro Tani、Yoshihisa Matsuda
DOI:10.1246/bcsj.60.311
日期:1987.1
acid in the dark. The electrochemical carbon-skeleton rearrangement was postulated to proceed via formation of anionic intermediates. The electrolyses of 1-bromo-2-cyano-2-ethoxycarbonylpropane, 2-acetyl-1-bromo-2-ethoxycarbonylpropane, and 1-bromo-2-[(ethylthio)carbonyl]propane with [Cob(II)7C1ester]ClO4 also afforded the corresponding carbon-skeleton rearrangement products. The results indicated that
在电化学条件下研究了由高氯酸七甲基钴酸盐 [Cob(II)7Cl酯]ClO4 催化的碳骨架重排。2,2-双(乙氧羰基)-1-溴丙烷被认为是甲基丙二酰辅酶A变位酶的模型底物,由[Cob(II)7C1酯]ClO4在N,N-二甲基甲酰胺中催化的电位控制得到重排产物 1,2-双(乙氧基羰基)丙烷,作为主要产物,在 -1.5V vs. SCE 条件下,在乙酸存在下,并且比 -1.8V vs. SCE 的阴极电位更高,没有乙酸黑暗的。电化学碳骨架重排被假定通过阴离子中间体的形成进行。1-溴-2-氰基-2-乙氧基羰基丙烷、2-乙酰基-1-溴-2-乙氧基羰基丙烷的电解,和 1-溴-2-[(乙硫基)羰基]丙烷与 [Cob(II)7Cl酯]ClO4 也提供相应的碳骨架重排产物。结果表明,具有两个吸电子...