Anomer Controlled Substitution Reactions; 2.1 Pyridine as a Leaving Group in Nucleophilic Substitution Reactions: Transformations of N-[1-(Trimethysilyloxy)alkyl]pyridinium Salts As a test of the prediction based on semiempirical MO-calculations the tide compounds 2 were treated with nucleophiles 3. A wide variety of 3 reacts with 2 to give 1-substituted 1-trimethylsiloxy products 4. The pyridine moiety of 2 functions as a neutral leaving group.
异头物控制下的取代反应;2.1
吡啶作为亲核取代反应中的离去基团:N-[1-(三甲基
硅氧基)烷基]
吡啶鎓盐的转化
为了验证基于半经验分子轨道计算的预测,潮汐化合物2与亲核试剂3进行了反应。广泛的3类试剂与2反应,生成1-取代的1-三甲基
硅氧基产物4。
在化合物2中,
吡啶部分作为中性离去基团发挥作用。