2,3-Dicyano 6 phenyl pyrazine herbicides

Details 2,3-Dicyano 6 phenyl pyrazine herbicides 2,3-Dicyano 6 phenyl pyrazine herbicides

1980-11-04

1984-07-17

Daus, Donald G.

Chemistry: fertilizers

Processes and products

Forms or conditioning

544120, 544408, 71 92, C07D24126, C07D24124, A01N 4360

Patent

active

044604033

ABSTRACT:
Novel 2,3-dicyanopyrazine derivatives of the formula ##STR1## wherein A represents a hydrogen atom, a lower alkyl group, an unsubstituted or substituted phenyl group, a benzyl group, or a group of the formula --ZR.sub.1 in which Z represents an oxygen or sulfur atom and R.sub.1 represents an unsubstituted or substituted lower alkyl group, a lower alkenyl group, a lower alkynyl group, an unsubstituted or substituted phenyl group, or an unsubstituted or substituted benzyl group; and B represents a halogen atom, an alkyl group containing at least 3 carbon atoms, a phenyl group having a substituent at the ortho- and/or meta-position of the benzene ring, a group of the formula ZR.sub.1 in which Z and R.sub.1 are as defined, or a group of the formula ##STR2## in which R.sub.2 and R.sub.3, independently from each other, represent a hydrogen atom, an unsubstituted or substituted lower alkyl group, a lower alkenyl group, a cycloalkyl group, an unsubstituted or substituted phenyl group, or an unsubstituted or substituted benzyl group, with the proviso that R.sub.2 and R.sub.3 do not represent a hydrogen atom at the same time, and R.sub.2 and R.sub.3 together may form a 3- to 7-membered heterocyclic ring together with the nitrogen atom to which they are bonded, said heterocyclic ring optionally containing an additional hetero atom; and processes for production thereof.
These compounds have high herbicidal activity, and are useful as active ingredients of herbicides.

REFERENCES:
patent: 2978310 (1961-04-01), Daams et al.
patent: 3763161 (1973-10-01), Hartter
patent: 3879394 (1975-04-01), Donald
patent: 3928352 (1975-12-01), Taylor
patent: 3940392 (1976-02-01), Johnston
patent: 4054655 (1977-10-01), Donald
patent: 4101546 (1978-07-01), Mixan
patent: 4113724 (1978-09-01), Portnoy
patent: 4259489 (1981-03-01), Takematsu
Klingman, Glenn, Weed Control as a Science, Wiley and Sons, New York, (1961), p. 22.

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