AN UNEXPECTED CYCLIZATION PATH TO SOME PYRAZOLES

DOI: 10.1016/S0040-4039(00)95039-1

Source and publish data:

Tetrahedron Letters p. 6151 - 6154 (1985)

Update date:2022-08-04

Topics:

Authors:

Kano, Kunio

Scarpetti, David

Anselme, Jean-Pierre

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Article abstract of DOI:10.1016/S0040-4039(00)95039-1

The treatment of ketal hydrazones of arylglyoxals (2) with 75percent sulfuric acid leads to 3-aroyl-4-phenyl-1-methylpyrazoles (6) as well as 4-phenyl-1-methylpyrazole (7) and the corresponding benzoic acids.Possible mechanisms are discussed.

Full text of DOI:10.1016/S0040-4039(00)95039-1

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