A Chan–Lam reaction has been used to prepare N-alkenyl-α,β-unsaturated nitrones, which undergo a subsequent thermal rearrangement to the corresponding tri- and tetrasubstituted pyridines. The optimization and scope of these transformations is discussed. Initial mechanistic experiments suggest a reaction pathway involving oxygen transfer followed by cyclization.
一种Chan-Lam反应被用来制备N-烯基-α,β-不饱和亚硝酮,随后经历热重排反应形成相应的三取代和四取代吡啶。对这些转化的优化和范围进行了讨论。最初的机理实验表明一个涉及氧转移后跟环化的反应途径。