The Isotopomeric (<i>Z</i>)- and (<i>E</i>)-2,3-Dimethyl(1,1,1,4,4,4-<sup>2</sup>H<sub>6</sub>)but-2-enes: Mechanistic Probes for Stereospecific Epoxidation
作者:Paul Müller、Jean Pfyffer
DOI:10.1002/hlca.19920750310
日期:1992.5.6
unambiguous methods, (Z)- and (E)-2, 3-dimethyl(1, 1, 1, 4, 4, 4-2H6)but-2-enes (3) were synthesized and transformed to the epoxides 4 with 3-chloroperbenzoic acids. Both the isotopomeric olefins and the epoxides are detected separately by 1H-NMR at 400 MHz. Epoxidation of (Z)-3 with [RhICl(PPh3)3]/cumene hydroperoxide resulted in a 1: 1 mixture of (Z)- and (E)-4, while reaction of (Z)-3 with [FeIII(tpp)]Cl/PhIO
通过明确的方法,合成了(Z)-和(E)-2,3-二甲基(1,1,1,4,4,4- 2 H 6)-2-烯(3)并转化为环氧化物4含3-氯过苯甲酸。同位素异构体烯烃和环氧化物分别通过1 H-NMR在400 MHz下检测。(Z)-3与[Rh I Cl(PPh 3)3 ] /异丙苯氢过氧化物的环氧化反应产生(Z)-和(E)-4的1:1混合物,而(Z)-3与[ Z ] -3的[铁III(tpp)] Cl / PhIO仅得到(Z)-4(tpp =四苯基卟啉)。