Mg<sup>2+</sup>-Promoted P–O vs. S–O Bond Cleavage in the Alcoholyses of Phenyl Phosphatosulfate
作者:Toshio Eiki、Shin-ichi Negishi、Mitsunori Izumi、Naoko Ishida、Hiroshi Hada
DOI:10.1246/bcsj.66.2931
日期:1993.10
In order to obtain insight into the selectivity of Mg2+ at the site of bond cleavage of P–O and S–O of the P–O–S linkage, metal ion-promoted alcoholyses of phenyl phosphatosulfate were studied. Mg2+ quantitatively promoted P–O bond cleavage in the methanolysis, but mixed cleavage of the P–O bond, which occurred partly due to hydrolysis by trace water and the S–O bond in the reaction of ethanol, 1-
为了深入了解 Mg2+ 在 P-O-S 键的 P-O 和 S-O 键断裂位点的选择性,研究了金属离子促进的磷酸苯基硫酸酯醇解。Mg2+ 在甲醇分解中定量地促进了 P-O 键的断裂,但 P-O 键的混合断裂发生,部分原因是微量水的水解和乙醇、1-或 2-丙醇反应中的 S-O 键。S-O 键裂解与混合裂解的比率以 EtOH (11.5%) < n-PrOH (13.3%) < i-PrOH (29.0%) 的顺序增加。另一方面,在 2-丙醇反应和甲醇分解中,Ca2+ 和 Zn2+ 分别促进选择性 P-O 和 S-O 键裂解。 Mg2+ 在键裂解位点选择性的介质依赖性变化进行了讨论。