Synthesis of Bromoundecyl Resorc[4]arenes and Applications of the Cone Stereoisomer as Selector for Liquid Chromatography
作者:Silvia Corradi、Giulia Mazzoccanti、Francesca Ghirga、Deborah Quaglio、Laura Nevola、Chiara Massera、Franco Ugozzoli、Giuseppe Giannini、Alessia Ciogli、Ilaria D’Acquarica
DOI:10.1021/acs.joc.8b00488
日期:2018.8.3
C-alkylated resorc[4]arenes, we planned to immobilize on a solid support resorc[4]arenes with C11-long side chains in the lower rim. To this purpose, we synthesized two conformationally diverse resorc[4]arenes containing a bromoundecyl moiety in the four axial pendants. The cone stereoisomer 6a (30% yield) was selected for the reaction with an aminopropylated silica gel (APSG) obtained from spherical Kromasil
作为我们对C-烷基化间苯二酚[4]芳烃多面性质的研究的扩展,我们计划将其固定在下边缘具有C 11-长侧链的固相支持间苯二酚[4]芳烃上。为了这个目的,我们合成了两个构型多样的间苯二[4]芳烃,在四个轴向侧基中含有一个溴氰基部分。选择圆锥立体异构体6a(30%的产率)与从球形Kromasil Si 100、5μm颗粒获得的氨基丙基化硅胶(APSG)反应,得到相应的固定化SP-C 11 -resorc [4]芳烃体系。对生成的极性包埋的固定相进行了充分表征,并在HPLC鉴别E / Z中进行了研究。天然存在的和半合成的康维他汀的立体异构体,康维他汀是(Z)-二苯乙烯抗癌药家族。椅子立体异构体6b(收率20%)在进行X射线衍射分析时显示出在晶格中值得注意的自组装,这是由于分子间Br··O卤素键相互作用而插入的疏水层和极性层的结果,根据独特的堆叠图案。在反相(RP)条件下分离高极性天然产物(即类黄酮