the ammonium salt from N‐methylation 2 dominated. The isomeric sulfonium salt 3 prepared by an independent route was found to be unstable and rearranged to the isomeric ammonium salt. The rearrangement pathway was investigated using deuterium‐labeled reactants. The sulfonium salt 3 also produced a piperazinium double salt 9 on heating. The reaction pathway was also followed by deuterium labeling. The
作为研究氮与
硫亲核试剂的一部分,描述了二甲基-(2-甲基
硫乙基)胺CH 3 SCH 2 CH 2 N(CH 3)2 1的甲基化产物的行为。在两种潜在产物(sulf盐或
铵盐)中,N-甲基化2的
铵盐占主导地位。发现通过独立途径制备的异构sulf盐3是不稳定的,并且重排为异构
铵盐。使用
氘标记的反应物研究了重排途径。sulf盐3也产生了
哌嗪复盐9在加热。反应路径之后还进行了
氘标记。结果支持以下结论:复盐9的生产涉及N,N-二甲基
叠氮鎓离子4的中间形成。