ベンゼンジアゾニウムスルファート, チオシアン酸イオンおよび各種金属イオンの反応によるフェニルチオシアナートの生成

概要

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Catalytic effect of some kinds of metal ions on the reaction of benzenediazonium sulfate and thiocyanate ion was examined by determination of phenyl thiocyanate produced using gas-liquid chromatography. Catalytic activities of metal ions were as follows : Cu^<2+>>Cu^+, Fe^<2+>> Hg^+ > Th^<4+>> Fe^<3+>, Bi^<3+> , Al^<3+>, Cr^<3+>, Pb^<2+>, Cd^<2+>, UO_2^<2+>, Ce^<3+>, Zn^<3+>, Co^<2+>> K^+, Na^+, NH_4^+, Mg^<2+>, Mn^<2+>, Hg^<2+>, Ni^<2+>, Ag^+ > Sn^<2+>. As a catalyst, Cu^<2+>, Cu^+, and Fe^<2+>were found to be more effective than Co^<2+> and Fe^<3+>, which were proposed by Korozynski, et al. The yield of phenyl thiocyanate was better, the larger the amount of thiocyanate ion added. When Cu^<2+> was used as a catalyst, the yield of phenyl thiocyanate was increased rapidly until the molar ratio of thiocyanate ion to metal ion became 4,and then slowed down according to the amount of thiocyanate ion. This new method of mixing one mole of benzene-diazonium sulfate, 4 or more mole of potassium thiocyanate, and 1 mole of cupric sulfate in neutral solution and allowing them to react is recommended for synthesis of phenyl thiocyanate, which is obtained in ca. 30% yield by this procedure.
公益社団法人日本薬学会の論文
1974-05-25