作者:Piotr Roszkowski、Dariusz Błachut、Jan K. Maurin、Magdalena Woźnica、Jadwiga Frelek、Franciszek Pluciński、Zbigniew Czarnocki
DOI:10.1002/ejoc.201301378
日期:2013.12
Suzuki reaction of tribromo-2,6-lutidine with (2-methoxyphenyl)boronic acid gave 3,4,5-tris(2-methoxyphenyl)-2,6-lutidine in the form of a mixture of three atropisomers that were stable at room temperature. Each isomer was isolated and fully characterized, including by X-ray structure determination. One of the isomers, being a racemic mixture, was separated into individual enantiomers by using semipreparative
三溴-2,6-二甲基吡啶与(2-甲氧基苯基)硼酸的铃木反应得到三种阻转异构体混合物形式的3,4,5-三(2-甲氧基苯基)-2,6-二甲基吡啶,在室内温度。每种异构体都经过分离和充分表征,包括通过 X 射线结构测定。其中一种异构体是外消旋混合物,通过使用半制备手性 HPLC 将其分离为单独的对映异构体。它们的绝对立体化学最初是根据 CD 光谱的计算计算确定的,最终通过 X 射线分析确认。