Please login first
The first synthesis of [1,2]oxaphosphinino[6,5-c]pyrazoles by thiophosphorylation of 6-aminopyrano[2,3-c]pyrazole-5-carbonitriles
* 1, 2, 3 , 1 , 3 , 3 , 4
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  V.I. Vernadsky Crimean Federal University, Tavrida Academy, 4 Vernadsky avenue, 295007 Simferopol, Russia


The reaction of 6-amino-3-methyl-2,4-dihydropyrano[2,3-c]pyrazole-5-carbonitriles with phosphorus sulfide in boiling pyridine leads to the formation of the unexpected [1,2]oxaphosphinino[6,5-c]pyrazoles. The structure of the products was confirmed by means of 2D NMR spectroscopy and X-ray analysis.

Keywords: thiophosphorylation, phosphorus (V) sulfide, pyrano[2,3-c]pyrazoles, 1,2-oxaphosphinine, X-ray structural analysis.