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The First Synthesis of [1,2]oxaphosphinino[6,5-c]pyrazoles by Thiophosphorylation of 6-Aminopyrano[2,3-c]pyrazole-5-Carbonitriles

1
Department of Chemistry and High Technologies, Kuban State University, 149 Stavropolskaya str, Krasnodar 350040, Russia
2
ChemEx Lab, Vladimir Dal’ Lugansk National University, 20A/7 Molodezhny, Lugansk 91034, Russia
3
Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., 355009 Stavropol, Russia
4
Taurida Academy of V.I. Vernadsky Crimean Federal University, 4 Prospekt Vernadskogo, 295007 Simferopol, Russia
*
Author to whom correspondence should be addressed.
Presented at the 22nd International Electronic Conference on Synthetic Organic Chemistry, 15 November–15 December 2018; Available Online: https://sciforum.net/conference/ecsoc-22.
Proceedings 2019, 9(1), 26; https://doi.org/10.3390/ecsoc-22-05680
Published: 14 November 2018
PDF [553 KB, uploaded 20 March 2019]

Abstract

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 with 2D Nuclear Magnetic Resonance (NMR) spectroscopy and X-ray analysis.
Keywords: Thiophosphorylation; phosphorus (V) sulfide; pyrano[2,3-c]pyrazoles; 1,2-oxaphosphinine; X-ray structural analysis Thiophosphorylation; phosphorus (V) sulfide; pyrano[2,3-c]pyrazoles; 1,2-oxaphosphinine; X-ray structural analysis
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Dotsenko, V.V.; Dushenko, V.A.; Aksenov, N.A.; Aksenova, I.V.; Netreba, E.E. The First Synthesis of [1,2]oxaphosphinino[6,5-c]pyrazoles by Thiophosphorylation of 6-Aminopyrano[2,3-c]pyrazole-5-Carbonitriles. Proceedings 2019, 9, 26.

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