Cyclophanes. VIII. Synthesis and DNA-Cleaving Activities of Novel Heterocyclophanes Containing Two 4,4'-Bithiazole Rings.
作者:Hideaki SASAKI、Atsumi SUEHIRO、Yasuyuki NAKAMOTO
DOI:10.1248/cpb.45.189
日期:——
The novel heterocyclophanes, 3, 6, 21, 24-tetraaza[8.8](2, 2')(4, 4'-bithiazolophane) (3a) and 3, 7, 22, 26-tetraaza-[9.9](2, 2')(4, 4'-bithiazolophane) (3b) were readily synthesized by the cyclization of 1, 4-dibromobutane-2, 3-dione with N, N'-bis(tert-butoxycarbonyl)ethylenediamine-N, N'-dipropionthioamide and N, N'-bis(tert-butoxycarbonyl)-trimethylenediamine-N, N'-dipropionthioamide, respectively, followed by acidic deprotection. Under physiological conditions, 3a and 3b at 5 μM showed considerable DNA-cleaving activities in the presence of Co(II) without any reducing agent.
新型杂环烷 3, 6, 21, 24-四氮杂[8.8](2, 2')(4, 4'-bithiazolophane) (3a) 和 3, 7, 22, 26-四氮杂-[9.9](2,2')(4,4'-联噻唑烷)(3b) 是通过环化 1,4-二溴丁烷-2,3-二酮与 N,N'-双(叔丁氧羰基)乙二胺-N、N,N'-双(叔丁氧羰基)乙二胺-N,N'-二丙硫异酰胺和 N,N'-双(叔丁氧羰基)三亚甲基二胺-N,N'-二丙硫异酰胺环化,然后进行酸性脱保护。在生理条件下,5 μM 的 3a 和 3b 在没有任何还原剂的情况下,在 Co(II) 存在下显示出相当大的 DNA 切断活性。