Nitropyrazoles. 11. Isomeric 1-methyl-3(5)-nitropyrazole-4-carbonitriles in nucleophilic substitution reactions. Comparative reactivity of the nitro group in positions 3 and 5 of the pyrazole ring
作者:I. L. Dalinger、A. A. Zaitsev、T. K. Shkineva、S. A. Shevelev
DOI:10.1023/b:rucb.0000035641.63102.14
日期:2004.3
-4-carbonitriles with anionic S-, O-, and N-nucleophiles (RSH, PhOH, and 3,5-dimethyl-4-nitropyrazole in the presence of K2CO3 or MeONa), it was shown that for N-substituted 3(5)-nitropyrazoles, the nitro group in position 5 is much more reactive than in position 3.
异构体 1-甲基-3-硝基-和 1-甲基-5-硝基吡唑-4-腈与阴离子 S-、O-和 N-亲核试剂(RSH、PhOH 和 3,5-二甲基-4-硝基吡唑在 K2CO3 或 MeONa 存在下),结果表明,对于 N-取代的 3(5)-硝基吡唑,5 位的硝基比 3 位的硝基更具反应性。