13C MAS nuclear magnetic resonance experiments. We have also studied the temperature profile during the reaction. A comparative study with the corresponding solvent-free microwave activated reaction showed the superiority of the ball-milling method; 31 examples are described, including the synthesis of the anti-aging agent C-phenyl-N-tert-butyl nitrone (PBN) and one of its analogues C-2-pyridyl-N-tert-butylnitrone
在无溶剂条件下,在球磨机中,通过等摩尔量的醛和N-取代的
羟胺缩合,在0.5–2小时内合成了各种C-芳基和C-烷基-硝基。无需排除空气和
水分即可进行反应,无需进一步纯化即可得到预期的产物。差示扫描量热法(
DSC)和固态13对该研究进行了补充C MAS核磁共振实验。我们还研究了反应过程中的温度曲线。与相应的无溶剂微波活化反应的比较研究表明,球磨法具有优越性。31个实施例中描述,包括抗老化剂的合成Ç苯基ñ -叔丁基硝酮(PBN)和其类似物的一个Ç -2-
吡啶基- ñ -叔-butylnitrone(2- PyBN)。