Crystals of benzimidazole derivatives and their production
US6002011A · kind A · utility
22Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1998 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Jan 21, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A substantially solvent-free and stable crystal of the compound of the formula: ##STR1## wherein the ring A may optionally be substituted, R.sup.1 represents hydrogen or an N-protecting group, each of R.sup.2, R.sup.3 and R.sup.4 (1) a hydrogen atom, (2) an alkyl group which may optionally be substituted with halogen atom(s) or (3) an alkoxy group which may optionally be substituted with halogen atom(s) or alkoxy; or its salt, is produced by subjecting a solvate of the compound (I) or its salt to de-solvent treatment, in an industrially advantageous method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.