Alkylidene Dihydropyridines Are Surrogates for Pyridylic Anions in the Conjugate Addition to α,β-Unsaturated Ketones
作者:Jiaqi Shi、Ashik Sayyad、Dan Fishlock、Arturo Orellana
DOI:10.1021/acs.orglett.1c03615
日期:2022.1.14
We show that alkylidene dihydropyridines, readily prepared from 4-alkylpyridines, behave as soft nucleophiles toward a range of α,β-unsaturated ketones under the influence of silyl Lewis acids to give the products of conjugate addition. In contrast to existing methods, which use strongly basic pyridylic anions, this reaction tolerates a wide array of functional groups, providing access to useful heterocyclic
我们表明,容易由 4-烷基吡啶制备的亚烷基二氢吡啶在甲硅烷基路易斯酸的影响下对一系列 α,β-不饱和酮表现为软亲核试剂,从而产生共轭加成产物。与使用强碱性吡啶阴离子的现有方法相比,该反应耐受多种官能团,提供了获得有用的杂环支架的途径。