4-Bromo-3-methyl-1-phenylpyrazole in Heterocyclic Synthesis: Unexpected Polysubstituted Pyrazole Derivatives
作者:Eman A. El-Rady、Fawi M. Abd El Latif
DOI:10.1002/jccs.200400119
日期:2004.8
Unexpected 4,4′-dipyrazolomethylidene (7), 4-amino-3a-bromo-3-methyl-1-phenylpyrazolo[3,4-b]pyridin-6-thione (9), 4,4′-dipyrazolyl (18), ethyl 4-(3-methyl-1-phenylpyrazole-4-yl)fuoro[2,3-c]pyrazole-4-carboxylate (25), as well as the expected fuoro[2,3-c]pyrazole derivatives (15), (20) and (28) were isolated from a one-pot reaction of 4-bromo-3-methyl-1-phenylpyrazole (1) with some readily available
意外的 4,4'-dipyrazolomethylidene (7)、4-amino-3a-bromo-3-methyl-1-phenylpyrazolo[3,4-b]pyridin-6-thione (9)、4,4'-dipyrazolyl (18) )、4-(3-甲基-1-苯基吡唑-4-基)氟代[2,3-c]吡唑-4-羧酸乙酯(25),以及预期的氟代[2,3-c]吡唑衍生物(15)、(20) 和 (28) 是从 4-溴-3-甲基-1-苯基吡唑 (1) 与一些容易获得的试剂的一锅反应中分离出来的。