1,3,6-Triphenyl-6-phenylazo-1,4,5,6-tetrahydropyridazin |
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| Authors: | Dr J Schantl |
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| Institution: | 1. Institut für Organische und Pharmazeutische Chemie der Universit?t Innsbruck, Innrain 52a, A-6020, Innsbruck, ?sterreich
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| Abstract: | Base induced 1.4-elimination of pyridine·HI from 1-(2-phenyl-2-phenylhydrazono-ethyl)-pyridinium iodide (6) yields 1.3.6-triphenyl-6-phenylazo-1.4.5.6-tetrahydropyridazine (8) the (4+2)-cyclodimer of the intermediate 1-phenyl-1-phenylazoethylene (7).8 can also be obtained by intramolecular oxidative cyclisation (with KMnO4) of 1.4-diphenylbutane-1.4-dione bisphenylhydrazone (12). Spectroscopic data (ms,1H-nmr, uv and ir/Raman) confirm the structure of8. |
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