A process for preparing halo-substituted aromatic acid (original) (raw)

1996

Abstract

The present invention relates to a method SE PAR ALA Preparation of 5-amino-2,4,6-triiodo-1,3BENCENODICARBOXILICO, comprising the steps: a) catalytic hydrogenation of 5-NITRO-1,3BENCENODICARBOXILICO IN A MEANS neutral or basic, which provides a AQUEOUS SOLUTION OF SODIUM SALT OF 5-AMINO1,3-benzenedicarboxylic; B) DIRECT iodine treatment solution sodium salt of 5-amino-1,3BENCENODICARBOXILICO derived from step a), without purification BACK WITH ICI SOLUTION IN HCI, with the salt solution SODIUM ACID 5-amino-benzenedicarboxylic ADDED TO PREVIOUSLY HCI YH {SUB, SUB 2} SO {4}.

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