A novel class of bidentate ligands with a conformationally flexible biphenyl unit built into a planar chiral [2.2]paracyclophane backbone
作者:V.I. Rozenberg、D.Yu. Antonov、R.P. Zhuravsky、E.V. Vorontsov、Z.A. Starikova
DOI:10.1016/s0040-4039(03)00711-1
日期:2003.5
We report the synthesis of a novel class of planar chiral bidentate aryl[2.2]paracyclophane ligands. For the first time in the [2.2]paracyclophanyl series the Pd-catalyzed Suzuki cross-coupling was employed for the formation of the arylparacyclophanyl skeleton. From the two possible approaches: (a) cross-coupling of [2.2]paracyalophanylboronic acids with aryl halides; (b) cross-coupling of [2.2]paracyclophanyl
我们报告了一种新型的平面手性二齿芳基芳基[2.2]对环环烷配体的合成。在[2.2]对环苯甲酰基系列中,钯催化的Suzuki交叉偶联首次用于芳基对环苯甲酰基骨架的形成。从两种可能的方法中:(a)[2.2]乙酰丙酰基硼酸与芳基卤化物的交叉偶联;(b)将[2.2]对环庚基卤化物与芳基硼酸交叉偶联,发现后者更为有效。该方法被成功地用于大范围的芳基的合成[2.2]与不同类型的取代模式(paracyclophanes邻- ,伪-邻-或伪-宝石(在功能上被取代的芳基片段相对于对环烷环中的取代基的-排列)。