A process for preparation of 4-mercapto-1-naphthol compounds which comprises the steps of: (i) obtaining a 4-heterocyclylthio-1-naphthol compound by reacting a 1-naphthol compound with a heterocyclylsulfur chloride or by reacting a 4-iodo-1-naphthol compound with an alkali metal or ammonium salt of a mercaptoheterocyclic compound, (ii) hydrolyzing the resulting 4-heterocyclylthio-1-naphthol compound in the presence of a base to form a reaction product, and (iii) acidifying said reaction product. The resulting compounds are useful as intermediates in the synthesis of bleach accelerator releasing couplers for use in silver halide color photographic materials.
一种制备4-巯基-1-
萘酚化合物的方法,包括以下步骤:(i)通过将1-
萘酚化合物与杂环
硫氯化物反应或将4-
碘-1-
萘酚化合物与巯基
杂环化合物的碱
金属或
铵盐反应,得到4-杂环
硫基-1-
萘酚化合物,(ii)在碱的存在下
水解所得的4-杂环
硫基-1-
萘酚化合物形成反应产物,(iii)使该反应产物酸化。所得化合物可用作漂白催化剂释放偶合剂的中间体,用于
银卤化物彩色摄影材料的合成。