O,O-Diethyl dithiophosphate → HCID 74390509, compound

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Reaction Steps

To a stirred solution of the ammonium salt of dithiophosphoric acid O,O-diethyl ester (15.8 g, 78 mmol) in ethanol (130 mL) at 80° C. is added 1,4-dibromo-2-butene (7.55 g, 35 mmol) in portions. The resulting mixture is cooled, diluted with water (150 mL) and extracted with methylene chloride (3×100 mL). The organic layer is dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to yield 15 g (99%) of S-[4-(diethoxy-thiophosphorylsulfanyl)-but-2-enyl]dithiophosphoric acid O,O′-diethyl ester, having the structure:

Provenance & Evidence