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Communication | Regular issue | Vol 51, No. 1, 1999, pp.1-4
Published online, 1st January, 1970
DOI: 10.3987/COM-98-8341
Alkenyl-substituted N,N''-Dioxygenated Pyrazoles by Nitrosation of Dienone Oximes

John F. Hansen* and Jinlin Wang

*Department of Chemistry, 305 Felmeley Hall, Campus Box 4160, Illinois State University, Normal, Illinois 61790-4160, U.S.A.


Nitrosation of 2,6-dirnethyl-2,5-heptadien-4-one oxime gave 3,3-dimethyl-5-(2-methyl-1-propenyl)-3H-pyazole 1,2-dioxide, while 1,5-diphenyl-1,4-pentadien-3-one oxime gave 3(5)-phenyl-5(3)-styryl-1-hydroxypyrazole 2-oxide. The latter pyrazole could also be obtained in low yield by nitrosation of 1,5-diphenyl-2,4-pentadien-1-one oxirne.