Preparation of benzimidazol-2-yl-carbamic acid alkyl esters
US3933846A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1973 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | May 24, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D235/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Preparation of benzimidazol-2-yl-carbamic acid alkyl esters of the formula ##SPC1## In which R.sup.1 is alkyl of 1 to 12 carbon atoms optionally substituted by alkoxy, alkylmercapto, nitrile, carbamide, alkenyl, alkynyl or halogen, R.sup.2 is hydrogen, halogen or lower alkyl or alkoxy, and R.sup.3 is hydrogen or alkyl of 1 to 8 carbon atoms, by reacting a 2-aminobenzimidazole of the formula ##SPC2## With EQU R.sup.4 --O--R' (III) in which R.sup.4 is hydrogen, ##SPC3## R.sup.5 and R.sup.6 each independently is alkyl or aryl with up to 10 carbon atoms, and X is halogen, nitro, or alkyl or alkoxy with 1 to 3 carbon atoms, provided that in formulae (II) and (III) one R.sup.4 is hydrogen and the other is not. The compounds exhibit fungicidal and mite-ovicidal activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.