Benzimidazole Derivatives
US4942245A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1988 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Apr 11, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D235/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Benzimidazole derivatives of the following formula, ##STR1## wherein R.sup.1 indicates hydrogen atom, lower alkyl group having carbon atoms of 1 to 6 or dimethylaminopropyl group, R.sup.2 indicates hydrogen atom or lower alkanoyl group having carbon atoms of 1 to 3, R.sup.3 indicates hydrogen atom, lower alkyl group having carbon atoms of 1 to 3 or lower alkanoyl group having carbon atoms of 1 to 3, X indicates sulfur atom, sulfinyl group, sulfonyl group, amino group or methylene group, A indicates alkylene group having carbon atoms of 1 to 12, which alkylene group may optionally be substituted by hydroxy group or lower alkyl group having carbon atoms of 1 to 3, --(CHR')N--CR".dbd.CR"--(CHR')M--, ##STR2## (in which R' and R" are each independently hydrogen atom, lower alkyl group having carbon atoms of 1 to 3 or hydroxy group, and n and m are equal to 0, 1, 2 or 3) and Y indicates oxygen atom or sulfur atom; their acid or alkali salts and hydrate thereof are useful as antiallergic agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.