REGIOSPECIFIC SYNTHESIS OF A NEW CHIRAL N-SUBSTITUTED PYRAZOLE USING A SESQUITERPENE HYDROCARBON

Treatment of β-enaminone 4 with 2-hydrazinopyridine gives a regiospecific formation N-substituted pyrazole 6. Enaminone 4 was prepared for the first time by reacting enone 3 with sodium azide in acidic medium. The structural assignment of 2, 3, 4, 5 and 6 is based upon 1 H, 13 C NMR spectroscopy, ma...

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Bibliographic Details
Published in:Synthetic communications 2002-01, Vol.32 (5), p.699-707
Main Authors: Auhmani, A., Kossareva, E., Eljamili, H., Reglier, M., Pierrot, M., Benharref, A.
Format: Article
Language:English
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Summary:Treatment of β-enaminone 4 with 2-hydrazinopyridine gives a regiospecific formation N-substituted pyrazole 6. Enaminone 4 was prepared for the first time by reacting enone 3 with sodium azide in acidic medium. The structural assignment of 2, 3, 4, 5 and 6 is based upon 1 H, 13 C NMR spectroscopy, mass spectrometry and X-ray structural analyses.
ISSN:0039-7911
1532-2432
DOI:10.1081/SCC-120002507