Benzoyl phenyl 1-methylpyrazoles. Synthesis, characterization, and spectra
The synthesis and unequivocal characterization of all six isomers of benzoyl phenyl 1-methylpyrazole (2) are described.The isomer of 2 isolated as one of the products of the reaction of 1,1-dimethyl-1-phenacylhydrazinium bromide (1) with base was shown to be only previously reported isomer, 5-benzoyl-3-phenyl-1-methylpyrazole (2b).
Kano, Kunio,Scarpetti, David,Warner, John C.,Anselme, Jean-Pierre,Springer, James H.,Arison, Byron H.
p. 2211 - 2219
(2007/10/02)
AN UNEXPECTED CYCLIZATION PATH TO SOME PYRAZOLES
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.
Kano, Kunio,Scarpetti, David,Anselme, Jean-Pierre
p. 6151 - 6154
(2007/10/02)
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