Cyanotetrachlorobenzenes, especially ortho- and para- dicyanotetrachlorobenzenes, are prepared by reacting in a liquid medium at 20-100°C a corresponding nitrotetrachloro- benzene with, in solution, an inorganic cyanide. Preferably the liquid medium is a two-phase water/water-immiscible organic solvent system, e.g. water/chloroform, a phase transfer catalyst is present and the inorganic cyanide is an alkali metal or alkaline earth metal cyanide.
The compounds are useful chemical intermediates in the synthesis of, for instance, pesticidal compounds.
氰基四
氯苯,特别是正二
氰基四
氯苯和对二
氰基四
氯苯,是通过在 20-100°C 的液态介质中使相应的硝基四
氯苯与溶液中的无机
氰化物反应制备的。液体介质最好是
水/
水不溶有机溶剂两相体系,如
水/
氯仿,存在相转移催化剂,无机
氰化物是碱
金属或碱土
金属
氰化物。
这些化合物是合成
杀虫剂化合物等的有用
化学中间体。