The First Synthesis and Characterization of Both Diastereomers of a Di[2.2]paracyclophane: 4,4‘-Bis(1,1,2,2,9,9,10,10-octafluoro[2.2]paracyclophane)
作者:A. J. Roche、J.-X. Duan、W. R. Dolbier,、K. A. Abboud
DOI:10.1021/jo0157775
日期:2001.10.1
of two [2.2]paracyclophane units linked through a single 4,4' bond are described. Both the meso and d,l diastereomers of 4,4'-bis(octafluoro[2.2]paracyclophane) have been prepared via a palladium-catalyzed reductive homocoupling reaction by copper, producing a 3:2 ratio of meso and d,l diastereomers. A similar reductive homocoupling of pseudo-o-iodotrifluoromethyloctafluoro[2.2]paracyclophane gave only
描述了由两个通过单一4,4'键连接的[2.2]对环环烷单元组成的系统的两种非对映异构体的合成和表征。4,4′-双(八氟[2.2]对环环烷)的内消旋和d,l非对映异构体均通过铜催化钯催化的还原均偶联反应制备,生成的内消旋和d,l非对映异构体比例为3:2。伪-邻-碘三氟甲基八氟[2.2]对环环烷的类似还原均偶联仅给出类似的内消旋非对映异构体。对于所有的双对环烷产物都获得了单晶X射线结构。