56159-67-2Relevant articles and documents
Rapid microwave-enhanced synthesis of 1-phenyl-3-methyl-5-Acyloxypyrazoles under solvent-free conditions
Bai, Yinjuan,Lu, Jun,Gan, Haiying,Wang, Zhenjun
, p. 2549 - 2553 (2002)
The microwave-enhanced synthesis of 5-acyloxypyrazoles from 1-phenyl-3-methylpyrazole-5-one and acid chlorides under solvent-free conditions has been achieved in moderate to good yield.
Synthesis of 1-acyl-1,2-dihydro-3H-pyrazol-3-ones via Lewis acid-mediated rearransement of 3-acyloxypyrazoles
Maruoka, Hiroshi,Yamagata, Kenji,Okabe, Fumi,Tomioka, Yukihiko
, p. 859 - 865 (2007/10/03)
The unusual formation of 1-acyl-1,2-dihydro-3H-pyrazol-3-ones starting from 3-acyloxypyrazoles by Fries-type rearrangement is described. Under normal conditions, acylation of 2,4-dihydro-3H-pyrazol-3-ones 1 and 2 with acid chlorides or anhydrides in the p