Production of 2-chloroformylethylmethylphosphinic acid chlorides

Details Production of 2-chloroformylethylmethylphosphinic acid chlorides Production of 2-chloroformylethylmethylphosphinic acid chlorides

1980-09-08

1982-03-09

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07F 934

Patent

active

043188656

ABSTRACT:
The invention relates to a process for making 2-chloroformylethylmethylphosphinic acid chlorides of the general formula: ##STR1## in which R.sup.1 and R.sup.2 each stand for hydrogen or CH.sub.3. To this end, methyldichlorophosphane is reacted with acrylic acid, methacrylic acid or crotonic acid at elevated temperature. More particularly, a solution of methyldichlorophosphane in phosphorus trichloride, the solution originating from a reaction of phosphorus trichloride with methane at temperature higher than 500.degree. C., is used. The reaction is effected at temperatures ithin the range 50.degree. to 90.degree. C. in the presence of hydrogen chloride; and the phosphorus trichloride is distilled off.

REFERENCES:
patent: 4022826 (1977-05-01), Lohmar et al.
patent: 4042888 (1977-12-01), Ohorodnik et al.
patent: 4101573 (1978-07-01), Gehrmann et al.
patent: 4104304 (1978-08-01), Schafer et al.
Khairullin, V. K. et al. Chemical Abstracts, vol. 69 (1968) #106,816k.
Rehberg, C. E. et al. J. Am. Chem. Socisty, vol. 67 (1945) pp. 208-210.

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