The Reactions of 3-Unsubstituted Isoxazolium Salts with 1,2-Dinucleophiles. Synthesis of 4-Functionalized 3-Aminoisoxazoles and 3-Aminopyrazoles
作者:A. Alberola、L. F. Antolín、P. Cuadrado、A. M. González、M. A. Laguna、F. J. Pulido
DOI:10.1055/s-1988-27512
日期:——
The reaction of 3-unsubstituted isoxazolium salts with 1,2-dinucleophiles (hydroxylamine, hydrazine, methylhydrazine, phenylhydrazine, 4-nitrophenylhydrazine, semicarbazide) in boiling ethanol, affords 4-functionalized 3-alkylaminoisoxazoles and 3-alkylaminopyrazoles in high yields. The procedure is quite general, thus providing a new method for the synthesis of 3-aminoazoles with potential biological activity. Mechanistic pathways for these transformations are proposed.
RAHMAN, A.;VISHWAKARMA, J. N.;YADAV, R. D.;ILA, H.;JUNJAPPA, H., SYNTHESIS, BRD, 1984, N 3, 247-249
作者:RAHMAN, A.、VISHWAKARMA, J. N.、YADAV, R. D.、ILA, H.、JUNJAPPA, H.
DOI:——
日期:——
Reaction of α-Ketoketene<i>S,N</i>-Acetals with Hydroxylamine: A Facile General Route to 5-Aryl-3-(<i>N</i>-arylamino,<i>N</i>-alkylamino, or<i>N</i>-azacycloalkyl)-isoxazoles
作者:A. Rahman、J. N. Vishwakarma、R. D. Yadav、H. Ila、H. Junjappa