Electrochemical Aminoxyl-Mediated α-Cyanation of Secondary Piperidines for Pharmaceutical Building Block Diversification
作者:Alastair J. J. Lennox、Shannon L. Goes、Matthew P. Webster、Hannes F. Koolman、Stevan W. Djuric、Shannon S. Stahl
DOI:10.1021/jacs.8b08145
日期:2018.9.12
Secondary piperidines are ideal pharmaceutical building blocks owing to the prevalence of piperidines in commercial drugs. Here, we report an electrochemical method for cyanation of the heterocycle adjacent to nitrogen without requiring protection or substitution of the N-H bond. The reaction utilizes ABNO (9-azabicyclononane N-oxyl) as a catalytic mediator. Electrochemical oxidation of ABNO generates
由于哌啶在商业药物中的普遍存在,二级哌啶是理想的药物成分。在这里,我们报告了一种无需保护或取代 NH 键即可使与氮相邻的杂环氰化的电化学方法。该反应使用 ABNO(9-氮杂双环壬烷 N-氧基)作为催化介质。ABNO 的电化学氧化产生相应的氧代铵物质,促进 2°哌啶脱氢为环亚胺,然后加入氰化物。低电位介导的电解过程与哌啶环上的各种杂环和氧化敏感取代基相容,并能够合成非天然氨基酸。