PROCESS FOR PREPARING 4-NITRO-OXY-METHYL-BENZOIC ACID
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...
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Main Authors | , , |
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Format | Patent |
Language | English Spanish |
Published |
12.11.2012
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Subjects | |
Online Access | Get full text |
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Summary: | 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.
La presente invención se refiere a un nuevo procedimiento de preparación del ácido 4-notro-oxi-metil-benzoico, que comprende las siguientes etapas: a) reacción del ácido 4-clorometil-benzoico con nitrato de plata y en presencia de un ácido como catalizador en acetonitrilo a temperatura de reflujo, seguido de enfriamiento y adición de un disolvente polar aprótico; b) separación de las sales de plata por filtración, seguido de lavado con un disolvente polar aprótico; c) precipitación del ácido 4-nitro-oxi-metil-benzoico con agua a partir del filtrado de la etapa b); y d) secado del ácido 4-nitro-oxi-metil-benzoico. |
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Bibliography: | Application Number: MX20120005615 |