| 摘要 |
Diketopyrrolopyrroles of formula I <IMAGE> (I) are prepared by reacting a diketopyrrolopyrrole of formula II <IMAGE> (II) with a) formic acid or b) a compound of formula III X'-H(III)or with an alkali metal formate or alkaline earth metal formate together with carbon monoxide in the presence of a catalyst, wherein, in formulae I, II and III, A is a direct bond or a group <IMAGE> wherein phenylene is bound to the pyrrolopyrrole, R1, R2 and R3 are each independently of one another hydrogen, halogen, C1-C6alkyl, C5-C6cycloalkyl, C1-C6alkoxy, C1-C6alkylamino, C1-C6alkylmercapto, -CF3, -CN or -NO2, X is X' or OH, X' is -OR4 or -N(R5)(R6), wherein R4 is C1-C18alkyl, C5-C6cycloalkyl; phenyl or naphthyl which is unsubstituted or substituted by halogen, C1-C6alkyl, C1-C6alkoxy, C1-C6alkylamino, -CN or -NO2, R5 and R6 are each independently of the other hydrogen, C1-C18alkyl, C5-C6cycloalkyl; phenyl or naphthyl which is unsubstituted or substituted by halogen, C1-C6alkyl, C1-C6-alkoxy, C4-C6alkylamino, -CN or -NO2, or a group -(CH2)n-SO3R7, wherein R7 is hydrogen, potassium or sodium, and n is an integer from 2 to 6, or R5 and R6, together with the linking nitrogen atom, are an unsubstituted or C1-C6alkyl- or phenyl-substituted 5- or 6-membered heterocyclic radical selected from the group consisting of pyrrolidinyl, piperidyl, pyrrolyl, triazolyl, imidazolyl, pyrazolyl, piperazinyl, morpholinyl, thiomorpholinyl, phthalimidyl, carbazolyl, indolyl, indazolyl, benzimidazolyl and tetrahydroquinolinyl, Y is R3 or <IMAGE> and Z is halogen.
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