功能化的氮杂环丁烷、2,3-二氢呋喃或非正统的二氧杂环己烷-3-氮杂双环酮-4-烯基序是N-环氧乙烷基甲基苯磺酰胺和 β-氯-肉桂醛之间的无过渡金属反应的产物,具体取决于是否使用 NaI /K 2 CO 3或 LiBr/K 2 CO 3。这些扩环反应涉及衍生自N-环氧乙烷基甲基苯磺酰胺和 β-氯肉桂醛作为中间体的烯酰胺(X 射线证据) 。N-环氧乙烷基甲基苯磺酰胺本身在加热时产生易于分离的结晶异构重氮杂环烷,其可通过X-射线晶体学表征。
Synthesis of 3-Arylpiperidines by a Radical 1,4-Aryl Migration
作者:Alexandru Gheorghe、Béatrice Quiclet-Sire、Xavier Vila、Samir Z. Zard
DOI:10.1021/ol0503642
日期:2005.4.14
[reaction: see text] A route to 3-arylpiperidines, 3-arylpyridines, and 5-arylpiperidin-2-ones involving a radical 1,4-aryl migration has been explored. The sequence requires a xanthate addition to an N-allylarylsulfonamide, followed by acetylation and treatment with dilauroyl peroxide to give the 1,4-aryl transfer product, which upon acidic hydrolysis affords the desired piperidine derivative.