作者:Irina A. Balova、Victor N. Sorokoumov、Svetlana N. Morozkina、Olga V. Vinogradova、David W. Knight、Sergey F. Vasilevsky
DOI:10.1002/ejoc.200400688
日期:2005.3
A two-step, one-pot synthesis of functionalised 1-arylalka-1,3-diynes is described. A key feature in this approach is exploitation of the “acetylene zipper” reaction to obtain terminal 1,3-alkadiynes 3 from internal isomers 1. Without isolation, but after protonation, the 1,3-alkadiynes 3 are subjected to subsequent Pd/Cu-catalyzed Sonogashira cross-couplings with aryl iodides having both electron-withdrawing
描述了功能化 1-arylalka-1,3-二炔的两步一锅合成。这种方法的一个关键特征是利用“乙炔拉链”反应从内部异构体 1 中获得末端 1,3-烷二炔 3。无需分离,但在质子化后,1,3-烷二炔 3 受到后续 Pd/Cu -催化 Sonogashira 与具有吸电子和给电子基团的芳基碘化物交叉偶联。整个序列在温和的反应条件下进行,以高产率提供官能化的 1-芳基烷-1,3-二炔 21-35。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)