Process for isolating 1-(alkoxyphenyl)-5-(phenyl)biguanide compo

Details Process for isolating 1-(alkoxyphenyl)-5-(phenyl)biguanide compo Process for isolating 1-(alkoxyphenyl)-5-(phenyl)biguanide compo

1979-05-10

1980-11-25

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12916

Patent

active

042358191

ABSTRACT:
The present invention provides an improved process of isolating purified, free 1-(alkoxyphenyl)-5-(phenyl)biguanide compounds, from a crude acid reaction mixture thereof. The compounds have the formula: ##STR1## where R is alkyl, linear of branched, having from 1-14 carbon atoms, and are useful as agricultural fungicides.
The process comprises neutralizing the crude acid reaction mixture with aqueous base to precipitate the crude, free biguanide, filtering, slurrying the precipitate with a purification solvent which is an aliphatic hydrocarbon straight chain or branched, having from 5-10 carbon atoms, or mixtures thereof, filtering the slurry, and, drying the solid. Hexane is preferred as the purification solvent.

REFERENCES:
patent: 2704710 (1979-01-01), Sprung
patent: 3996232 (1976-12-01), Diamond et al.
patent: 4137332 (1979-01-01), Brown et al.
Wheeler Henry, et al., "On a Class of Pseudothioureas Described as Normal Ureas." J. A. C. S. vol. 25 (1903) pp. 719-722.

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