SU410029A1 - - Google Patents

Description

one

This invention relates to a new, previously unknown type of phosphorus compounds of the general formula

(RO) .P (O) CH - CH, P (O) (OR),

P (OR).

where R is the same or different alkyls.

The compounds obtained can be used as complexing agents, as well as for the synthesis of new types of organophosphorus complexones and extractants.

The proposed method for the preparation of alkylene (phosphonito) diphosphopates consists in that the tetraalkylpyrophosphite is reacted with the dialkyl vinyl phosphonate by heating, preferably to 100-200 ° C, in an inert gas atmosphere, such as argon, followed by isolation of the target product by known methods.

The process proceeds according to the scheme:

(RO) .P-O-P (OR). + (R0), p (O) CH.

 (RO), P (O) CH - CH, P (O) (OR),

P (OR),

where R is the same or different alkyls.

Example. Preparation of tetraethylethylene (O, 0-diethylphosphonite) -1,2-diphosphonate (the reaction is carried out in a stream of dry argon).

A mixture of 13 g (0.05 mol) of tetraethyl pyrophosphite and 8.2 g (0.05 mol) of diethyl vinyl phosphonate is heated for 3 hours at 170 ° C. Monitoring the progress of the reaction is carried out by IR spectroscopy. With the disappearance of the absorption band corresponding to the C – C bond of the vinylphosphonate, heating is stopped. The reaction mixture is distilled in vacuo. Obtain 15 g (70%) of the desired product, t. Kip. 140 ° C /

/ 0.01 mm Hg. Art. df I, l362, no

1.4542. C 40.14; P 7.62; R 21.57. Mro

Found 100.7.

SyNzOOrz.

C 39.83; H 7.88; P 22.01. Calculated,%: MRn 100.9.

Subject invention

Claims (2)

1. A method for producing alkylene (phosphonito) diphosphonates, characterized in that the tetraalkyl pyrophosphate is reacted with a dialkyl vinyl phosphonate under an inert gas such as argon, with heating, followed by isolation of the target product by known methods. 2. A method according to claim 1, characterized in that the process is carried out at 100-200 ° C.