Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent
Patent
1979-09-04
1980-12-30
Sutto, Anton H.
Organic compounds -- part of the class 532-570 series
Organic compounds
Chalcogen in the nitrogen containing substituent
260987, 546 22, C07D29500, C07F 9165, C07F 965
Patent
active
042425115
ABSTRACT:
The invention relates to an improved process for making amine salts of acid O,S-dialkylthiophosphoric acid esters of the general formula (I) ##STR1## in which R.sub.1 stands for the ammonium ion of primary or secondary aliphatic, cycloaliphatic or aromatic amines or of a heterocyclic nitrogen base and R.sub.2 and R.sub.3 each stand for an alkyl group by subjecting an O,O,S-trialkyl-thiophosphate to partial dealkylation and forming the salt of the dealkylated product by treatment with an amine corresponding to the ammonium ion R.sub.1. In the improved process an O,O,S-trialkylthiophosphate of the general formula (II) ##STR2## in which R.sub.2 and R.sub.3 have the meanings given above, is mixed with at least stoechiometric proportions of water and an amine corresponding to the ammonium ion R.sub.1, the resulting mixture is reacted, with agitation, over a period of about 3 to 8 hours at a temperature within the range 0.degree. to 120.degree. C., and the amine salt of the general formula (I) is separated from the reaction mixture.
REFERENCES:
patent: 3839505 (1974-10-01), Oswald et al.
Hoechst Aktiengesellschaft
Sutto Anton H.
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