Processes for preparing 1-butyl-2-[2'-(2H-tetrazol-5-yl) biphenyl-4-ylmethyl]-1H-indole-3-carboxylic acid
US5446121A · kind A · utility
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7Claims
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Key dates
| Filing date | Jan 17, 1995 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Jan 17, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P43/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to processes for preparing 1-butyl-2-[2'-(2H-tetrazol-5-yl)biphenyl-4-ylmethyl]-1H-indole-3-carboxyli c acid and to intermediates useful in such processes. The present invention also relates to a process for deprotecting compounds containing a protected 2H-tetrazolyl group, which process comprises reacting a the protected compound with a Lewis acid in the presence of a thiol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.