Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1980-02-04
1981-09-08
Ford, John M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
C07D25150
Patent
active
042885949
ABSTRACT:
A new and improved process is provided for preparing monochloro-diamino-s-triazines which are useful as herbicides.
The process comprises reacting in a first stage cyanuric chloride and a selected monoalkylamine hydrochloride at elevated temperature to give a dichloro-monoalkylamino-s-triazine and reacting in a second stage this dichloro-monoalkylamino-s-triazine with an excess of a different monoalkylamine which may be introduced as a pure liquid, as gas or as a solution in water. The third stage of the process consists of an exchange whereby the monoalkylamine hydrochloride of the first stage and the free monoalkylamine of the second stage are generated. The process gives consistent yields in excess of 97% of monochloro-diamino-s-triazines. Because the process is caustic-free and due to the feasibility of recycling the excess of monoalkylamines employed, no serious effluent problems arise.
REFERENCES:
patent: 3074946 (1963-01-01), Rattenbury et al.
patent: 3328399 (1967-06-01), Prill
patent: 3577417 (1971-05-01), Cantrall et al.
patent: 3586679 (1971-06-01), Tandon et al.
McCracken Philip G.
Myatt Hal
Petree Harris E.
Ciba-Geigy Corporation
Ford John M.
Jorda Karl F.
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