6,8-Dimethylpyrimido[4,5-c]pyridazine-5,7(6H,8H)-dione: new heterocyclizations based on SNH-methodology. Unexpected formation of the first iso--electronic analogue of the still unknown dibenzo[a,o]pycene

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Keywords: 3-akylamino-6,8-dimethylpyrimido[4,5-c]pyridazine-; dibenzo[a,o]pycene; imidazole-ring annulation; imidazoline-ring annulation; nucleophilic substitution of hydrogen; pyrrole-ring annulation

Document Type: Research Article

DOI: http://dx.doi.org/10.1016/j.tet.2003.08.002

Affiliations: Department of Chemistry, Rostov State University, 344090 , Rostov-on-Don, Russian Federation

Publication date: September 22, 2003

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