Production of 2-carboxyethyl(phenyl)phosphinic acid

Details Production of 2-carboxyethyl(phenyl)phosphinic acid Production of 2-carboxyethyl(phenyl)phosphinic acid

1976-12-27

1978-03-28

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260544R, 260545P, C07F 930

Patent

active

040814637

ABSTRACT:
2-Carboxyethyl(phenyl)phosphinic acid is prepared in two stages by first reacting dichloro(phenyl)phosphine with acrylic acid employed at a molar excess of 25% to 45% to form a mixture of three intermediates, namely 3-(chlorophenylphosphinyl)propionyl chloride, the cyclic anhydride of 2-carboxyethyl(phenyl)phosphinic acid and the mixed anhydride of acrylic acid with 3-chlorocarbonylethyl(phenyl)phosphinic acid. The second stage of the process is the hydrolysis of the mixture of three intermediates set forth above to obtain the desired product. The product is useful as a flame retardant material when used with organic polymers such as polyesters.

REFERENCES:
pudovik et al., "Zhur. Obsch. Kim.," 37, No. 2, (1967), pp. 425-427.
Pudovik et al., "Russian Chemical Reviews," vol. 37, No. 5, (1968), pp. 317-332.
Wagner et al., "Synthetic Organic Chemistry," (1953), pp. 558-559.

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