Tributyl phosphite → Phosphorochloridous acid, dibutyl ester

Participants

Reaction Steps

17.0 g (0.125 mole) of phosphorus trichloride is added dropwise at 5° to 10° C., with vigorous stirring, to a mixture of 62.5 g (0.25 mole) of tri-n-butylphosphite and 5.0 g of benzyltriethylammonium chloride (water content 7%). After completion of the addition, the reaction mixture is heated to room temperature and stirred for a further 8 hours at this temperature. After separation of the benzyltriethylammonium chloride by filtration there is obtained, by distillation of the filtrate under reduced pressure, 51.8 g (65% of theory, relative to phosphorus trichloride) of di-n-butylchlorophosphite, b.p. 96° to 98° C./10 Torr.

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