877926-90-4Relevant academic research and scientific papers
METHOD FOR PRODUCING QUATERRYLENE-3,4:13,14-TETRACARBOXY DIIMIDES BY DIRECT SYNTHESIS
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Page/Page column 15-16, (2008/06/13)
The invention relates to a method for producing the quaterrylene-3,4:13,14-tetracarboxy diimides of general formula (I), wherein R, R' independently represent hydrogen or optionally substituted C1-C30 alkyl, C3-C8 cycloalkyl or aryl or hetaryl. The inventive method is characterized by reacting the perylene-3,4-dicarboximide of the general formula (IIa) in the presence of a base resistant, high-boiling, organic solvent and an alkali-containing or alkaline earth-containing base with the perylene-3,4-dicarboximide of the general formula (IIb), wherein X represents hydrogen, bromine or chlorine.
