105592-62-9Relevant academic research and scientific papers
Benzoyl phenyl 1-methylpyrazoles. Synthesis, characterization, and spectra
Kano, Kunio,Scarpetti, David,Warner, John C.,Anselme, Jean-Pierre,Springer, James H.,Arison, Byron H.
, p. 2211 - 2219 (2007/10/02)
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).
FORMATION OF PYRAZOLES AND OF IMIDAZOLES FROM PHENACYL KETAL HYDRAZONES OF ALDEHYDES
Scarpetti, David,Kano, Kunio,Anselme, Jean-Pierre
, p. 1073 - 1082 (2007/10/02)
The cyclization of phenacyl ethylene ketal (pek) hydrazones of glyoxals, benzaldehyde and acetaldehyde to pyrazoles is described; in the case of the hydrazones of benzaldehyde and acetaldehyde, the corresponding imidazoles are also formed.A mechanism is suggested for the formation of the imidazoles.
AN UNEXPECTED CYCLIZATION PATH TO SOME PYRAZOLES
Kano, Kunio,Scarpetti, David,Anselme, Jean-Pierre
, p. 6151 - 6154 (2007/10/02)
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.
