作者:Ekaterina E. Sizova、Evgenii V. Arshinov、Yana A. Kotsareva、Larisa V. Glizdinskaya、Galina P. Sagitullina
DOI:10.1007/s10593-017-2165-y
日期:2017.9
3-Acetyl-4,6-diaryl-2-methylaminopyridines were synthesized via rearrangement of quaternary 4,6-diaryl-3-cyano-2-methylpyridinium salts. Annulation of the pyrazole ring of pyrazolo[3,4-b]pyridines was achieved by N-nitrosation of the methylamino group of the pyridine and reduction of N-nitroso group to the hydrazine group with simultaneous intramolecular closure of the pyrazole ring.
通过4,6-二芳基-3-氰基-2-甲基吡啶季铵盐的重排合成了3-乙酰基-4,6-二芳基-2-甲基氨基吡啶。吡唑并吡唑环的环并[3,4- b ]吡啶通过实现Ñ的甲基氨基的吡啶和减少的-nitrosation Ñ亚硝基组与吡唑环的分子内同时闭合肼基。