Dicarboxylic acid bis-(3,5-dicarbamoyl-2,4,6- triiodoanilides)

Details Dicarboxylic acid bis-(3,5-dicarbamoyl-2,4,6- triiodoanilides) Dicarboxylic acid bis-(3,5-dicarbamoyl-2,4,6- triiodoanilides)

C - Chemistry, Metallurgy

07

C

260/539.2

C07C 233/12 (2006.01) C07C 233/02 (2006.01)

Patent

CA 1106401

ABSTRACT OF THE DISCLOSURE The present invention provides a tetracarboxylic acid tetrachloride of the general formula II Image (II) in which R3 represents a hydrogen atom or a lower alkyl group and X represents a direct carbon-to-carbon bond or an alkylene group which may be interrupted by at least one oxygen atom and/or may be substituted by at least one substituent selected from hydroxyl groups and lower alkyl groups; the compounds are intermediates in the preparation of dicarboxylic acid bis-(3,5-dicarbamoyl-2,4, 6-triiodoanilides) which are X-ray contrast agents.

348166

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