作者:Samira M. Abozeid、Didar Asik、Gregory E. Sokolow、Jonathan F. Lovell、Alexander Y. Nazarenko、Janet R. Morrow
DOI:10.1002/anie.202003479
日期:2020.7.13
forms two isomers as shown by 1H NMR spectroscopy. X‐ray crystallographic studies show one isomer with 1,8‐pendants in cis‐configuration and a second isomer with 1,4‐pendants in trans‐configuration. The [Co(L2)]2+ complex has 1,8‐pendants in a cis‐configuration. Remarkably, the paramagnetic‐induced shift of water 1H NMR resonances in the presence of the [Co(L1)]2+ complex is as large as that observed for
含有 2-羟丙基侧基的三个顺磁 Co II大环配合物,1,1',1'',1'''-(1,4,8,11-四氮杂环十四烷-1,4,8,11-四基)四基- (丙-2-醇) ([Co(L1)] 2+ , 1,1′-(4,11-二苄基-1,4,8,11-四氮杂环十四烷-1,8-二基)双(丙-2 -ol) ([Co(L2)] 2+ ) 和 1,1′-(4,11-二苄基-1,4,8,11-四氮杂环十四烷-1,8-二基)双(十八烷-2-醇合成了)([Co(L3)] 2+ )制备过渡金属脂质体化学交换饱和转移(lipoCEST)剂。在溶液中,([Co(L1)] 2+ )形成两种异构体, 1 H NMR谱显示. X 射线晶体学研究表明,一种异构体具有顺式构型的 1,8-侧基,另一种异构体具有反式构型的 1,4-侧基。[Co(L2)] 2+络合物具有 1,8-侧基值得注意的是,在 [Co(L1)] 2+配合物存在下,顺磁诱导的水1