Three-Component Coupling Sequence for the Regiospecific Synthesis of Substituted Pyridines
作者:Ming Z. Chen、Glenn C. Micalizio
DOI:10.1021/ja2105703
日期:2012.1.18
A de novo synthesis of substituted pyridines is described that proceeds through nucleophilic addition of a dithiane anion to an α,β-unsaturated carbonyl followed by metallacycle-mediated union of the resulting allylic alcohol with preformed trimethylsilane-imines (generated in situ by the low-temperature reaction of lithium hexamethyldisilazide with an aldehyde) and Ag(I)- or Hg(II)-mediated ring closure
描述了取代吡啶的从头合成,通过将二噻烷阴离子亲核加成到 α,β-不饱和羰基,然后金属环介导的所得烯丙醇与预先形成的三甲基硅烷-亚胺(由低-六甲基二硅肼锂与醛的温度反应)和 Ag(I)-或 Hg(II)-介导的闭环。该过程可用于具有完全区域化学控制的二至五取代吡啶的会聚组装。