Synthese de l'acide (chloro-3 cyclohexyl-4 phenyl)-4 oxo-4 butyrique (804 CB) marque au carbone 14
作者:L. Pichat、J. P. Beaucourt、M. Herbert、F. Krausz、J. C. Breliere
DOI:10.1002/jlcr.2580120402
日期:1976.10
The Grignard reagent made from p-cyclohexyl m-chloroiodobenzene is carbonated with 14CO2 to give 3-chloro 4-cyclohexyl benzoǐc acid (radioactive yield 50 %). This acid is transformed into the corresponding chloride with thionyl chloride. Condensation of the chloride with tris-(trimethylsilyl) 1-lithio-1,1,2 ethane tricarboxylate gives after hydrolysis 4-(3-chloro 4-cyclohexyl phenyl) 4-oxobutyric acid 4-14C with an overall yield of 41 % based on barium carbonate. (Specific activity : 53 mCi/mMole).
用 14CO2 碳酸对环己基间氯碘苯制成的格氏试剂,可得到 3-氯-4-环己基苯甲酸(放射性产率为 50%)。这种酸用亚硫酰氯转化为相应的氯化物。酰氯与三-(三甲基硅基)1-硫代-1,1,2-乙烷三羧酸酯缩合,水解后得到 4-(3-氯-4-环己基苯基)4-氧代丁酸 4-14C,以碳酸钡为基准,总收率为 41%。(比活度:53 mCi/mMole)。