Journal of the Chemical Society. Perkin transactions I p. 331 - 342 (1980)
Update date:2022-08-03
Topics:
Katritzky, Alan R.
Dennis, Nicholas
Dowlatshahi, Hossein A.
1-Heteroaryl-3-oxidopyridinium dimers with dienamines give cycloadducts which are dehydrogenated to 'mixed dimer' of the corresponding 2-heteroaryl-4-oxidoisoquinolinium with the starting 1-heteroaryl-3-oxidopyridinium.The 'mixed dimer' (21) is also effectively prepared by a two-step sequence of a novel intramolecular oxidation-reduction, followed by oxidation of the resulting alcohol.The 'mixed dimers' undergo reversible thermal dissociation and in one case the corresponding monomers could be trapped as various cycloadducts.
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