The soivolysis of <i>trans</i>-1,2-diphenyl-2-phenylthio[1-<sup>13</sup>C]vinyl tosylate in anhydrous or aqueous acetic acid
作者:Choi Chuck Lee、Charles Y. Fiakpui、J. Wilson Quail
DOI:10.1139/v82-109
日期:1982.3.15
The acetolysis of trans-1,2-diphenyl-2-phenylthiol[1-13C]vinyl tosylate (2-OTs-1-13C) under anhydrous conditions (HOAc–Ac2O–NaOAc) gave trans-1,2-diphenyl-2-phenylthio[1,2-13C]vinyl acetate (2-OAc-1,2-13C) as product. The label was scrambled equally over C-1 and C-2 and there was no detectable amount of cis-product. These results are consistent with the involvement of an intermediate sulfur-bridged
trans-1,2-diphenyl-2-phenylthiol[1-13C]vinyl tosylate (2-OTs-1-13C) 在无水条件 (HOAc-Ac2O-NaOAc) 下乙酰化得到 trans-1,2-diphenyl-2 -苯硫基[1,2-13C]乙酸乙烯酯(2-OAc-1,2-13C)作为产物。标记在 C-1 和 C-2 上等量打乱,没有可检测到的顺式产物。这些结果与反应中涉及中间体硫桥连的钍离子一致。2-OTs-1-13C 在 70% HOAc – 30% H2O 中的溶解,其中含有 3 当量。NaOAc 生成 1,2-二苯基-2-苯硫基 [1,2-13C] 乙酮 (α-苯基-α-(苯硫基) 苯乙酮) (5-1,2-13C) 和 1,2-二苯基 [1, 2-13C]乙酮(脱氧安息香)(6-1,2-13C)分别作为主要和次要产物。这两种酮中的 13C 标记再次均等地分布在