作者:G. G. Levkovskaya、G. V. Bozhenkov、L. I. Larina、A. N. Mirskova
DOI:10.1023/a:1022564707537
日期:——
A new regioselective heterocyclization was revealed in the reaction of 2-chloro- and 2,2-dichloro(bromo)vinyl ketones with N,N-dimethylhydrazine to afford 3-substituted 1-methyl(5-halo)pyrazoles. The reaction is accompanied by elimination of methyl halide and formation of up to 90% of N,N,N-trimethylhydrazinium halide as the second product.