本文仅討論1—(2,4—=硝基苯基)—3—甲基—4—硝基吡吶唑酮—5的制备,这个类型的化合物,早前由德国化学家F.J.Neleher.制得1-(4-硝基苯基)—3—甲基—4—硝基吡吶唑酮,—5在无机分析上用來重量法测定釷,在有机分析上用来鉴定氨基酸、胺类植物硷等的试剂,作者希望能够旨成此种类型結構的化合物,而与小量数较1(4—硝基苯基)—3—甲基—4—硝基吡吶酮为大,因为考虑到分子量大在測定釷时得到的沉淀较重易准确与氨基酸植物硷生成熔点 This article deals only with the preparation of 1- (2,4- = nitrophenyl) -3-methyl-4-nitropyrazolone-5, a compound of this type previously described by the German chemist FJ Neleher 1- (4-nitrophenyl) -3-methyl-4-nitropyrazolone, -5 is used for the gravimetric determination of thorium on inorganic assays and on organic assays for the identification of amino acids, amines Plant alkaloids and the like, the authors hoped to be able to target compounds of this type of structure rather than smaller quantities than 1 (4-nitrophenyl) -3-methyl-4-nitropyrrolone because Taking into account the large molecular weight in the determination of thorium heavier and more accurate precipitation with the amino acid plant alkalinity melting point