Synthesis of 3-Phenyl-4-piperidones from Acetophenone by Shapiro and Aza-Michael Reactions and Their Further Derivatization
作者:Anna Rosiak、Christoph Hoenke、Jens Christoffers
DOI:10.1002/ejoc.200700325
日期:2007.9
The Shapiro reaction of acetophenone is the key in a convenient three-step access to a divinyl ketone which is further transformed by double aza-Michael reactions with primary amines into N-substituted 3-phenyl-4-piperidones. In the case of N-benzyl and N-allyl derivatives, the piperidine nitrogen atom can be deprotected and further functionalized, for example, by carboxamide, carbamate, or urea formation
苯乙酮的夏皮罗反应是方便三步获得二乙烯基酮的关键,二乙烯基酮通过与伯胺的双氮杂-迈克尔反应进一步转化为 N-取代的 3-苯基-4-哌啶酮。在 N-苄基和 N-烯丙基衍生物的情况下,哌啶氮原子可以脱保护并进一步官能化,例如通过甲酰胺、氨基甲酸酯或尿素的形成。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim , 德国, 2007)