Electrolysis of 3-arylthiomethyl-γ-cephems possessing various substituents on the arylthio moiety undergo chemoselective and product-selective electrooxidation to give several different products. These include isomeric mixtures of the corresponding methoxylated cephems, a bis[(γ-cephem-3-yl)methyl]disulfide or a 3-dimethoxymethyl-γ-cephem. The selectivity of the oxidation is highly dependent on the nature of the substituents on the arylthio moiety which suggests that both steric and electronic effects play an important role in the electrooxidation of 3-arylthiomethyl-γ-cephems.
芳
硫基部分上具有各种取代基的3-芳
硫基甲基-β-头孢烯的电解经过
化学选择性和产物选择性电氧化,得到几种不同的产物。这些包括相应的甲氧基化头孢烯、双[(β-头孢烯-3-基)甲基]二
硫化物或3-二甲氧基甲基-β-头孢烯的异构体混合物。氧化的选择性高度依赖于芳
硫基部分上的取代基的性质,这表明空间效应和电子效应在3-芳
硫基甲基-β-头孢烯的电氧化中发挥着重要作用。