Dipolar Cycloaddition Route to Diverse Analogues of Cocaine: The 6- and 7-Substituted 3-Phenyltropanes
作者:Alan P. Kozikowski、Gian Luca Araldi、Richard G. Ball
DOI:10.1021/jo961957g
日期:1997.2.1
type I was required. Starting from 3-hydroxy-1-methyl-4-phenylpyridinium iodide, we disclose a pyridinium betaine-based dipolar cycloaddition route to tropenones of type II. In turn, we show how this intermediate can be transformed to type I products either through the copper-catalyzed conjugate addition reaction of Grignard reagents to the enones 7-9 or by the copper(I)-catalyzed cross coupling reaction
在我们寻求可卡因的拮抗剂或部分激动剂的过程中,需要获得某些I型6位和7位取代的3-苯基环烷烃。从碘化3-羟基-1-甲基-4-苯基吡啶鎓开始,我们公开了基于吡啶甜菜碱的双极性环加成途径形成II型氢酮。反过来,我们展示了该中间体如何通过格氏试剂与烯酮7-9的铜催化共轭加成反应或通过烯丙基乙酸酯15a的铜(I)催化交叉偶联反应转化为I型产物和16a用格氏试剂。