Process for the manufacture of p-hydroxyphenyl-acetic acid
US4590295A · kind A · utility
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Key dates
| Filing date | Apr 24, 1985 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Apr 24, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/377
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
p-Hydroxyphenylacetic acid is prepared by reduction of p-hydroxymandelic acid with HI in the presence of red phosphorus. According to a preferred embodiment, the reaction is carried out in one vessel in which the mandelic acid is prepared in situ from phenol and glyoxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.