Process for the manufacture of benzimidazolones-(2)
US4138568A · kind A · utility
16Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1977 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | May 31, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D235/26
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the manufacture of benzimidazolones-(2) wherein an o-phenylenediamine is reacted with optionally alkylated urea in the ratio of 1 to 1.3 moles per mole o-phenylenediamine in an organic solvent which has a solubility in water of not more than 5 g/l and has a boiling point above 100.degree. C, at a temperature between 100.degree. and 200.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.