Calix[n]bispyrrolylbenzenes: Synthesis, Characterization, and Preliminary Anion Binding Studies
作者:Jonathan L. Sessler、Deqiang An、Won-Seob Cho、Vincent Lynch、Manuel Marquez
DOI:10.1002/chem.200400894
日期:2005.3.18
bonding donor groups are found in both compounds. The basic building block for 9 a, benzene dipyrrole 8 a, also displays a higher affinity for anions than the building block for 1, dimethyldipyrromethane 16. Structural studies, carried out by single-crystal X-ray diffraction analyses, are consistent with the solution-phase results and reveal that 9 a is able to stabilize complexes with chloride and nitrate
通过TFA-合成了一系列新颖的杯状吡咯类大环,杯状[n]双(吡咯-2-基)苯(杯[n] BPBs,n = 2-4)9 a-11 a。双(吡咯-2-基)苯8a与丙酮的催化缩合反应。Calix [2] BPB 9a代表calix [4]吡咯的扩展版本,其中四个内消旋桥中的两个被苯环取代。相比之下,对杯二吡咯2和3有相当大影响的系统10a和11a代表基本杯[n] BPB基序的较高同源物。通过在[D2]二氯甲烷中的(1)H NMR光谱滴定法和在1,2-二氯乙烷中的等温滴定量热法(ITC)进行的溶液相阴离子结合研究表明,9 a结合了具有较高亲和力的典型小阴离子比1 即使在两个化合物中都发现了相同数量的氢键供体基团。9 a的基本结构单元,苯二吡咯8 a,对阴离子的亲和力也比1,二甲基二吡咯甲烷16的结构单元高。相结果显示9a能够稳定固态的氯化物和硝酸盐的配合物。还解析了10a的PF6-和NO3-配合物