The Ei Reaction of Substituted<i>threo</i>- and<i>erythro</i>-1-Phenylethyl Phenyl Sulfoxides
作者:Toshiaki Yoshimura、Eiichi Tsukurimichi、Yukihiko Iizuka、Hironobu Mizuno、Hiroshi Isaji、Choichiro Shimasaki
DOI:10.1246/bcsj.62.1891
日期:1989.6
Substituted (RS,SR)-1-phenylethyl phenyl sulfoxides (threo) (XC6H4S(O)CH(CH3)C6H4Y) and some substituted (RR,SS)-sulfoxides (erythro) were prepared and kinetic investigation for the thermal decomposition was carried out at 80.0, 90.0, and 100.0 °C in dioxane. Hammett plots for threo-XC6H4S(O)CH(CH3)C6H5 gave positive ρ-values (ρX=0.60–0.64 at three temperatures), while those for threo- and erythro
制备了取代的 (RS,SR)-1-苯乙基苯基亚砜 (threo) (XC6H4S(O)CH(CH3)C6H4Y) 和一些取代的 (RR,SS)-亚砜 (erythro) 并进行了热分解动力学研究在二恶烷中分别在 80.0、90.0 和 100.0 °C 下进行测试。苏式-XC6H4S(O)CH(CH3)C6H5 的哈米特图给出了正 ρ 值(三种温度下的 ρX=0.60–0.64),而苏式和赤式 C6H5S(O)CH(CH3)C6H4Y 的哈米特图给出了正的 ρ 值(ρX=0.60–0.64)尽管取代基的影响很小,但在 m-OCH3 取代基处形成带有底部的线条。同时,在所有温度下都观察到苏-和赤-C6H5S(O)CH(CD3)C6H4Y(Y=H,p-OMe,m-Cl)(kH⁄kD=4-6)的大动力学同位素效应。所有亚砜的活化能在 104-121 kJ mol-1 的范围内,而激活熵相对较大(7-37