This invention relates, in one of its aspects, to a process for the preparation of ortho-methyl anilines from ortho-amino benzyl sulfoxides. An ortho-amino benzyl sulfoxide is converted to an ortho-amino benzyl halide by reaction with a nonoxidizing acid halide and is converted to a stable quaternary salt by reaction with a tertiary amine preferably in the presence of an alcohol. The quaternary salt may be cleaved by hydrogenation to form ortho-methyl anilines. Other aspects of the invention relate to novel intermediate quaternary salts and to a process for forming those quaternary salts.
本发明的一个方面涉及一种由原
氨基
苄基亚砜制备原甲基
苯胺的工艺。原
氨基
苄基亚砜通过与非氧化性酸卤化物反应转化为原
氨基苄基卤化物,然后通过与叔胺反应(最好在醇存在下)转化为稳定的季盐。季盐可通过氢化作用裂解形成邻甲基
苯胺。本发明的其他方面涉及新型中间季盐和形成这些季盐的工艺。