Syntheses of 8-quinolinolatocobalt(iii) complexes containing cyclen based auxiliary ligands as models for hypoxia-activated prodrugs
作者:John Yu-Chih Chang、Ralph J. Stevenson、Guo-Liang Lu、Penelope J. Brothers、George R. Clark、William A. Denny、David C. Ware
DOI:10.1039/c0dt01142h
日期:——
The syntheses of cobalt(III) complexes containing a tetradentate cyclen, N,N′-1,7-Me2cyclen, cyclam or L2–L7 ligand together with the bidentate 8-quinolinato (8QO−) ligand, of interest as it is a model for a more potent cytotoxic analogue, were investigated. Coordination of ligands (L) cyclen, N,N′-1,7-Me2cyclen or cyclam to cobalt(III) was achieved using Na3[Co(NO6)] to form [Co(L)(NO2)2]+. HOTf (
新的配体H 2 L2-H 2 L6组成了环大环,该环在N,N'-二烷基在1,7-氮原子处被带有末端磺酸基(C 3 H 2 L2)的三碳和四碳烷基链膦酸酯化(C 3 H 2 L3,C 4 H 2 L4)或羧酸(C 3 H 2 L5,C 4 H 2 L6)基团,并且HL7被四碳磺酸基团N-单烷基化。通过桥连的烷基化制备配体双缩醛中间的。的合成钴(III) 含四齿周期素的复合物, Ñ,Ñ '-1,7--ME 2环烯,cyclam或L2-L7配体以及双齿 8-喹啉(8QO - )配体,的,因为它是一个更有效的细胞毒性类似物的模型的兴趣,进行了调查。配体(L)的配位过程Ñ,Ñ '-1,7--ME 2环烯 或仙客来 钴(III)使用Na 3 [Co(NO 6)]形成[Co(L)(NO 2)2 ] +可以实现。HOTf(三氟甲磺酸)用于制备三氟甲磺酸盐配合物 [Co(L)(OTf)2 ] +,然后替换不稳定的