Single-Step Synthesis of 5,6,7,8-Tetrahydroindolizines via Annulation of 2-Formylpiperidine and 1,3-Dicarbonyl Compounds
作者:Simona S. Capomolla、Ngiap-Kie Lim、Haiming Zhang
DOI:10.1021/acs.orglett.5b01671
日期:2015.7.17
expedient single-step synthesis of 5,6,7,8-tetrahydroindolizines has been achieved via the annulation of commercially available 2-formylpiperidine hydrochloride and 1,3-dicarbonyl compounds in THF in the presence of pyrrolidine and 4 Å molecular sieves. A variety of β-ketoesters, ketones, and amides participated in this annulation chemistry, affording the desired 5,6,7,8-tetrahydroindolizines in moderate to
在吡咯烷和4Å分子筛的存在下,通过将市售的2-甲酰基哌啶盐酸盐和1,3-二羰基化合物在THF中环化,已实现了5,6,7,8-四氢吲哚并苯的简便单步合成。各种β-酮酸酯,酮和酰胺参与了这种环化反应,以中等至良好的产率提供了所需的5,6,7,8-四氢吲哚并酮。