Patent ID: 6177570
Filing Date: 2001-01-23
Classification: C07D

Abstract:
A process for preparing bisimides of the formula I ##STR7##whereR is --Alk.sup.1 --NH--Alk.sup.2 --(NH--Alk.sup.3).sub.a --, where Alk.sup.1, Alk.sup.2 and Alk.sup.3 are C.sub.2-6 -alkylene radicals, and a is 0 or 1,R.sup.1 +R.sup.2 together are ##STR8##andR.sup.3 +R.sup.4 together are ##STR9##whereX.sup.1 and X.sup.2, which may be identical or different, are hydrogen or halogen atoms, nitro groups, amino groups which are unsubstituted or substituted by 1 or 2 C.sub.1-4 -alkyl radicals, or hydroxyl groups, mercapto groups or C.sub.1-4 -alkyl groups, andX.sup.3 and X.sup.4, which may be identical or different, are hydrogen or halogen atoms, amino groups which are unsubstituted or substituted by 1 or 2 C.sub.1-4 -alkyl radicals, or hydroxyl groups, mercapto groups or C.sub.1-4 -alkyl groups, by reacting the corresponding dicarboxylic anhydrides of the formulae II and IIIR.sup.1 --CO--O--CO--R.sup.2 (II)R.sup.3 --CO--O--CO--R.sup.4 (III),where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have the abovementioned meanings, with an amine of the formula H.sub.2 N--R--NH.sub.2, where R has the same meaning as above,wherein the reaction is carried out in the presence of a tertiary amine.