PROCESS FOR PREPARING 4-NITRO-OXY-METHYL-BENZOIC ACID
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United States of America Patent
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Issued Date -
May 23, 2013
app pub date -
Nov 15, 2010
filing date -
Nov 16, 2009
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Abandoned
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Abstract
This invention relates to a new process for preparing 4-nitro-oxy-methyl-benzoic acid, comprising the following steps: a) reaction of 4-chloromethyl-benzoic acid with silver nitrate and in the presence of an acid as a catalyst in acetonitrile at reflux temperature, followed by cooling and adding of a polar aprotic solvent; b) separation of the silver salts by filtration, followed by washout with a polar aprotic solvent; c) precipitation of the 4-nitro-oxy-methyl-benzoic acid with water from the filtrate obtained in step b); and d) drying of the 4-nitro-oxy-methyl-benzoic acid.
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