crystals as a product. The direct-acting mutagen that was isolated was provisionally identified as 5-ethyl-5-nitro-1-pyrazoline 1-oxide by 1H and 13C nuclear magnetic resonance (NMR) spectroscopy, infrared (IR) spectroscopy and X-ray crystallography. To confirm the structure of the mutagen, the authentic compound was synthesized from 2-nitrobutene and diazomethane, followed by N-oxidation with m-chloroperoxybenzoic
N-亚硝基二烷基胺通过在Ames试验中在大鼠S9混合物存在下形成α-羟基亚硝胺来显示其诱变性。Fe 2+ –H 2 O 2(芬顿试剂)和Cu 2+衍生的羟基将N-亚硝胺(其烷基链长于丙基部分)活化为直接作用的诱变剂。Fe 2+ –Cu 2+ –H 2 O 2对亚硝胺的代谢活化反应活性尚未完全表征。在这里,我们报告了从N-亚硝基N衍生的直接作用诱变剂的鉴定Fe 2 +,Cu 2 +,H 2 O 2和一氧化氮(NO)存在下的N-甲基戊胺(NMPe),这是亚硝胺代谢的产物。将NMPe反应混合物的二氯甲烷萃取液通过硅胶柱色谱法和制备型高效液相色谱法(HPLC)分馏数次。我们获得了白色晶体作为产品。分离出的直接作用诱变剂通过1 H和13临时鉴定为5-乙基-5-硝基-1-吡唑啉1-氧化物C核磁共振(NMR)光谱,红外(IR)光谱和X射线晶体学。为了确认诱变剂的结构中,正宗化合物由2- nitrobut