申请人:DOWELANCO
公开号:EP0261348A2
公开(公告)日:1988-03-30
In accordance with the present invention, 2,3,5,6-tetrachloropyridine is advantageously prepared by contacting pentachloropyridine in a solvent selected from alkylnitriles, water, alkylsulfoxides, tetramethylsulfone, C-1 to C-5 alcohols, alkyl carbonates and mixtures thereof, in the presence of an ammonium salt of an organic or inorganic acid with 0.7 to 1.1 g atoms of zinc per mole of pentachloropyridine.
根据本发明,制备 2,3,5,6-四氯吡啶的有利方法是,在每摩尔五氯吡啶中含有 0.7 至 1.1 克锌原子的有机酸或无机酸的铵盐存在下,将五氯吡啶与选自烷基硝酸酯、水、烷基硫氧化物、四甲基砜、C-1 至 C-5 醇、烷基碳酸盐及其混合物的溶剂接触。