Process of preparation of racemic hydroxyarylglycolic acids and novel products resulting therefrom
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United States of America Patent
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Jul 13, 1982
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N/A
app pub date -
Feb 25, 1981
filing date -
Jul 25, 1979
priority date (Note) -
Expired
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Abstract
The invention relates to a process of preparation of racemic hydroxyarylglycolic acids and the novel products resulting therefrom. According to such process glyoxylic acid is condensed in water in the presence of an alkaline agent at a temperature of between 35.degree. and 100.degree. C., on an excess, or not, of phenolic aromative derivative other than phenol, having at least one proton on either of the ortho or para positions with respect to the phenol function. Application to the production of novel acids such as 4-hydroxy 3-tertiobutyl mandelic acid, 2-hydroxy 5-tertiobutyl mandelic acid, 3-chloro 4-hydroxy mandelic acid, 2-fluoro 4-hydroxy mandelic acid, monohydrated 3,5-dimethoxy 4-hydroxy mandelic acid, 2-hydroxy 5-methyl mandelic acid, (1-hydroxy 2-naphthyl) glycolic acid, 4-ethyl 2-hydroxy mandelic acid, and 4-hydroxy 3-methyl mandelic acid.
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