Preparation of 4-cyano-4'-hydroxybiphenyl
US6046352A · kind A · utility
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6Claims
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Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C253/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a preparation process for 4-cyano-4'-hydroxybiphenyl, the process comprising the protection of the aldehyde function of 4-bromo-benzaldehyde, the reaction of the protected 4-bromo-benzaldehyde with p-alkoxyphenyl magnesium halide, the deprotection of the formyl radical of the protected 4-alkoxy-4'-formyl-biphenyl and conversion of the formyl group into cyano and hydrolysis of the alkoxy group of the resulting 4-alkoxy 4'-cyano-biphenyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.