Chemistry of Heterocyclic Compounds p. 1349 - 1357 (1990)
Update date:2022-07-30
Topics:
Voshula, V. N.
Vysotskii, Yu. B.
Seraya, V. I.
Novikova, N. T.
Mushii, R. Ya.
Dulenko, V. I.
The interaction of 1-methallylpyrazoles with acetic or propionic anhydride in the presence of perchloric acid forms products of acylation at the double bond and subsequent heterocyclization - pyrazolo<1,2-a>pyridazinium salts - that are representatives of a new heteroaromatic system.Analogous cyclization is observed in the acylation of 3-(2-hydroxy-2-methylpropyl)pyrazole.
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