Preparation of 2-diethoxyphosphinylimino-1,3-dithietane

Details Preparation of 2-diethoxyphosphinylimino-1,3-dithietane Preparation of 2-diethoxyphosphinylimino-1,3-dithietane

C - Chemistry, Metallurgy

07

F

260/327.3

C07F 9/24 (2006.01)

Patent

CA 1078398

TITLE: PROCESS FOR THE PREPARATION OF 2-DIALKOXYPHOSPHINYLIMINO-1,3- DITHIETANE ABSTRACT 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 isothio- cyanate, reacting the latter with 1.1 to 1.2 molar equivalents of an alkali mercaptan in the presence of a water:acetone mixture (1:9 to 1:3), and finally reacting resultant di- alkoxyphosphinyldithiocarbamate with methylene bromide or methylene iodide to obtain a 2-dialkoxyphosphylimino-1,3-di- thietane.

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