Production of high viscosity phosphoric and phosphonic acid aryl

Details Production of high viscosity phosphoric and phosphonic acid aryl Production of high viscosity phosphoric and phosphonic acid aryl

1978-08-25

1980-07-15

Sutto, Anton H.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

260968, C07F 909

Patent

active

042128323

ABSTRACT:
A process for the production of a relatively high molecular weight phosphoric or phosphonic acid aryl ester, comprising reacting a phosphoric or phosphonic acid aryl ester with formaldehyde in the presence of sulphuric acid at a temperature from about 10.degree. to 120.degree. C. Advantageously, the aryl ester is of the formula ##STR1## in which R is a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a halogen atom, an aryloxy group, or an aryl group;

REFERENCES:
patent: 2290294 (1942-07-01), Riess et al.
patent: 2520090 (1950-08-01), Barrett
patent: 4067933 (1978-01-01), Wilson, Jr.
Chemical Abstracts, Abstract of Japanese Kokai 74,118,914, Nov. 13, 1974.

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