70124-98-0Relevant academic research and scientific papers
Process for the preparation of 2-(4-hydroxyphenyl)-3-methylbutyric acid
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, (2008/06/13)
An integrated process for the preparation of 2-(4-hydroxyphenyl)-3-methylbutyric acid from the corresponding 2-(4-chlorophenyl)-3-methylbutyronitrile through hydrolysis of the nitrile by strong base to the corresponding carboxylic acid followed by formation of the corresponding phenol by nucleophilic displacement of the chlorine with a strong base in the presence of copper salts, and if so desired metallic copper, is described.
Method of preparing 4-(α-alkyl-α-cyano-methyl)2,6-di-substituted phenols
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, (2008/06/13)
4-(α-alkyl-α-cyano-methyl)2,6-di-substituted phenols having the formula STR1 wherein R is methyl, ethyl, n-propyl or isopropyl are prepared by reacting a di-substituted phenol, such as 2,6-di-tertiary-butyl phenol, with a Friedel-Crafts addition agent in the presence of a Friedel-Crafts catalyst such as aluminum chloride to form the corresponding 4-(α-alkyl-α-oxo-methyl)2,6-di-substituted phenol. The 4-(α-alkyl -α-oxo-methyl)2,6-di-substituted phenol thus formed readily can be reduced to form the corresponding 4-(α-alkyl-α-hydroxy-methyl)2,6-di-substituted phenol which thereafter can be reacted with an alkali metal or an alkaline earth metal cyanide to form the desired 4-(α-alkyl-α-cyano-methyl)2,6-di-substituted phenol. This can be converted by hydrolysis into the corresponding α-alkyl-4-hydroxyphenylacetic acid. These acids are well-known insecticidal and acaricidal intermediates.
Process for preparing phenylalkanoic acids
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, (2008/06/13)
Hydroxyphenylacetic acids are formed from the corresponding benzaldehydes or alkyl phenyl ketones by reduction, cyanation and hydrolysis without isolation or purification of intermediate products.
Method for the alkylation of phenylacetonitriles
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, (2008/06/13)
A method for the alkylation of certain substituted phenylacetonitriles with alkylhalides in the presence of solid particulated alkali metal hydroxides under essentially anhydrous conditions. Trialkylamine catalysts may optionally be utilized. Compounds obtained by this method, some of which are valuable intermediates in the preparation of pyrethroid pesticides, are described.
