Method for preparing lintitript potassium salt
US6365748B1 · kind B1 · utility
3Cited by
1References
28Claims
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Key dates
| Filing date | Jan 18, 2001 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Jan 18, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D417/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for preparing the potassium dihydrate salt of 2-[[4-(2-chlorophenyl)-2-thiazolyl]carbamoyl]indole-1-acetic acid, by reacting 2-[[4-(2-chlorophenyl)-2-thiazolyl]carbamoyl]indole-1-acetic acid or its C1-C4 alkyl esters with potassium carbonate in a two phase solvent system comprising a mixture of water and an organic solvent which is only slightly miscible with water and optionally recrystallising the precipitated intermediate solvate from water and to the potassium dihydrate salt thus obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.