申请人:American Cyanamid Company
公开号:US04065466A1
公开(公告)日:1977-12-27
There is provided a fully integrated process for preparing a 2-dialkoxyphosphinylimino-1,3-dithietane in good overall yields with considerable savings in materials, time and labor involving a plurality of steps comprising the overall reaction of a dialkoxyphosphoryl chloride and an alkali metal- or ammonium thiocyanate to obtain a dialkoxyphosphinyl isothiocyanate, reacting the latter with 1.1 to 1.2 molar equivalents of an alkali mercaptan in the presence of a water and, finally, reacting resultant dialkoxyphosphinyldithiocarbamate with methylene bromide or methylene iodide in the presence or absence of a non-ionic surfactant under controlled pH conditions ranging from 5 to 8 to obtain resultant 2-dialkoxyphosphinylimino-1,3-dithietane. The latter finds utility for the control of root-knot nematode.
提供了一种完全集成的工艺,用于制备2-二烷氧基膦酰亚胺-1,3-二硫杂环烷,总收率良好,节省了大量的材料、时间和劳动力,包括多个步骤的整体反应,其中包括将二烷氧基膦酰氯和碱金属或铵硫氰酸盐反应以获得二烷氧基膦酰异硫氰酸酯,将后者与1.1至1.2摩尔当量的碱性巯基醇在水的存在下反应,最后在控制在pH 5至8的条件下,在存在或不存在非离子表面活性剂的情况下,将所得的二烷氧基膦酰二硫代氨基甲酸酯与溴代甲烷或碘代甲烷反应,以获得2-二烷氧基膦酰亚胺-1,3-二硫杂环烷。后者可用于控制根结线虫。