74748-77-9

Upstream product

• 57025-35-1 3,11-bis-(4,6-dimethyl-pyrimidin-2-yl)-(1rN,2tC¹²,6tC¹²,7cN)-3,11-diaza-tricyclo[5.3.1.1^2,6]dodeca-4,9-diene-8,12-dione 
• 941-69-5 N-phenyl-maleimide 
• 67678-46-0 3,13-bis-(4,6-dimethylpyrimidin-2-yl)-12a,12-dihydro-(8a,12a-benzo)-3,13-diazatricyclo<5.3.1.1^2,6>dodec-4-ene-8,14-dione 

Relevant academic research and scientific papers

1,3-Dipolar Character of Six-membered Aromatic Rings. Part 48. Novel Conversions of Pyridines to Isoquinolines

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.