BRIDGEHEAD NITROGEN HETEROCYCLES FROM 2,4,6-TRIPHENYLPYRYLIUM CATION AND THIOSEMICARBAZIDE OR THIOCARBOHYDRAZIDE

DOI: 10.1016/S0040-4020(01)91325-0

Source and publish data:

Tetrahedron p. 4901 - 4910 (1984)

Update date:2022-08-03

Topics: Cyclization Thiosemicarbazide Crystallography Condensation Reaction Nucleophilic Attack Spectroscopic Characterization Yield Optimization

Authors:

Molina, P.

Tarraga, A

Serrano, C.

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Article abstract of DOI:10.1016/S0040-4020(01)91325-0

2,4,6-Triphenylpyrylium with thiosemicarbazide and thiocarbohydrazide, gives 2-pyrazolines 3a and 3b which undergo cyclization yielding pyrazolo<1,5-c>pyrimidine 5 and pyrazolo<2,3-d>-1,2,4-triazepine 7 derivatives, respectively.Reaction of 7 with phenacy

Full text of DOI:10.1016/S0040-4020(01)91325-0

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