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Synthesis of 7-thia-1,4,6,8-tetraazabenzo[de]anthracenes
* 1, 2, 3 , 4 , 2, 5
1  Kuban State University, 149 Stavropolskaya Str., Krasnodar 350040, Russian Federation
2  ChemEx Lab, Vladimir Dal’ Lugansk National University, Lugansk, 91034 Russia.
3  North-Caucasus Federal University, 1 Pushkina St., 355009 Stavropol, Russian Federation
4  The Federal State Unitary Enterprise "Institute of Chemical Reagents and High Purity Chemical Substances" of National Research Centre "Kurchatov Institute", 3 Bogorodsky Shaft, Moscow 107076, Russia
5  Lugansk State Medical University, 1-g 50 years of Lugansk Defence, Lugansk 91045, Russia


New polyheterocyclic ensembles of 8,9,10,11-tetrahydro-7-thia-1,4,6,8-tetraazabenzo[de]anthracenes were prepared by reaction of easily available 5Н-pyrido[2',3':2,3]thiopyrano[4,5-b]pyridines with Ас2О or acyl chlorides. The starting 5Н-pyrido[2',3':2,3]thiopyrano[4,5-b]pyridines were prepared by reaction of N-methylmorpholinium 4-aryl-3-cyano-6-oxo-1,4,5,6-tetrahydropyridine-2-thiolates with malononitrile dimer.

Keywords: malononitrile dimer, thiatetraazabenzo[de]anthracene, tetrahydropyridine-2-thiolates, acylation, heterocyclization, Meldrum's acid