Patent · US Expired

2-cyanobenzimidazoles and their use, and new precursors

US5510364A · kind A · utility

9Cited by

9References

10Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Winfried Lunkenheimer · Wuppertal, DE
Heinz-Wilhelm Dehne · Monheim, DE
Ulrike Wachendorff-Neumann · Neuwied, DE

Key dates

Filing date	Nov 24, 1992
Grant date	Apr 23, 1996
Priority date	—
Expiry date	Nov 24, 2012

Classification

Technology area (CPC A)Human Necessities
CPC primaryA01N43/90
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

New 2-cyanobenzimidazoles of the formula (I) ##STR1## in which R.sup.1, R.sup.2 and A have the meaning given in the description, a preparation process, their use in agriculture, for example against fungi, insects etc., and new intermediates. PA0 Formula (I) provides a definition of the compounds; for example they are obtained from suitable 2-cyanobenzimidazoles which are unsubstituted in the 1-position with N,N-dimethylsulphamoyl halide. The 2-cyanobenzimidazoles which are unsubstituted in the 1-position are equally new and can be reacted from suitable phenylenediamines of the formula (IV) with methyl 2,2,2-trichloroacetimidate of the formula (V) to give the 2-trichloromethylbenzimidazoles of the formula (VI), which are equally new and from which the compounds of the formula (II) can subsequently be obtained with ammonia.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.