Diastereomeric Atropisomers from a Chiral Diyne by Cobalt(I)-Catalyzed Cyclotrimerization
作者:Fabian Fischer、Phillip Jungk、Nico Weding、Anke Spannenberg、Holger Ott、Marko Hapke
DOI:10.1002/ejoc.201200402
日期:2012.10
diastereomeric atropisomers in good yield and nearly 1:1 ratios. Facile chromatographic separation of the naphthyl tetrahydroisoquinolines gave access to both pure and stable diastereomeric atropisomers. The deprotection and direct functionalization of the methyl- or methoxymethyl-protected 2-naphthyl position of the atropisomers were investigated. The configuration of the formed atropisomers was assigned
在热和光化学条件下,通过 CoI-烯烃配合物催化的关键 [2+2+2] 环加成反应步骤,新型、手性、脯氨酸基萘二炔与不同腈的反应以良好的收率和接近 1:1 的比例得到非对映异构阻转异构体比率。萘基四氢异喹啉的简便色谱分离提供了纯的和稳定的非对映阻转异构体。研究了阻转异构体的甲基或甲氧基甲基保护的 2-萘基位置的脱保护和直接官能化。根据 X 射线研究和圆二色光谱的结果确定形成的阻转异构体的构型。