Process for preparing herbicidal N-methylol derivatives of 4-ami

Details Process for preparing herbicidal N-methylol derivatives of 4-ami Process for preparing herbicidal N-methylol derivatives of 4-ami

1986-05-05

1988-02-26

Ford, John M.

Chemistry: fertilizers

Processes and products

Forms or conditioning

544182, C07D25306, A01N 43707

Patent

active

047597950

ABSTRACT:
N-Methylol derivatives of herbicidal 4-amino-1,2,4-triazine-5-ones can be prepared by reacting formaldehyde with a 4-amino-1,2,4-triazine-5-one slurried in water under basic conditions. The N-methylol derivatives can be surface-modified by slurrying particles of the derivatives in water and treating with a strong acid or strong base, producing a product that releases the original herbicidal 4-amino-1,2,4-triazine-5-one in a controlled manner.

REFERENCES:
patent: 3671523 (1972-06-01), Westphal et al.
patent: 3920645 (1975-11-01), Schibler et al.
patent: 4067724 (1978-01-01), Draber et al.
patent: 4346220 (1982-08-01), Fawzi
patent: 4614799 (1986-09-01), Tocker
"Symposium on Controlled Release of Bioactive Materials, III", pp. 7 to 11, Peppermen, Jr. et al. (1979).
Bann et al., Chemical Reviews, vol. 58, pp. 146 to 148 (1958).

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