GIORI, P.;VERONESE, A. C.;VICENTINI, C. B.;GUARNERI, M., J. HETEROCYCL. CHEM., 1985, 22, N 4, 1093-1096
作者:GIORI, P.、VERONESE, A. C.、VICENTINI, C. B.、GUARNERI, M.
DOI:——
日期:——
Synthesis of 4-thiocarbamoyl-5-aminopyrazoles
作者:P. Giori、A. C. Veronese、C. B. Vicentini、M. Guarneri
DOI:10.1002/jhet.5570220434
日期:1985.7
Aryl and t-butylhydrazines react with 2-cyano-3-ethoxythiocrotonamide affording 2-cyano-3-aryl-t-butylhy-drazinothiocrotonamides. These intermediates can be easily cyclized to 4-thiocarbamoyl-5-aminopyrazoles by heating a few minutes in a strong base. Alkylhydrazines react with 2-cyano-3-ethoxythiocrotonamide yielding directly a mixture of the cyclized compounds 4-cyano-5-aminopyrazoles and 4-thio