Synthesis, DNA cleavage, and cytotoxicity of a series of bis(propargylic) sulfone crown ethers
作者:Mark M. McPhee、Sean M. Kerwin
DOI:10.1016/s0968-0896(01)00150-x
日期:2001.11
molecular recognition of specific alkalimetalions with DNA damage may display selective cleavage of DNA under conditions of elevated alkalimetalion levels reported to exist in certain cancer cells. We have prepared a homologous series of compounds in which a DNA reactive moiety, a bis(propargylic) sulfone, is incorporated into an alkalimetalionbindingcrownether ring. Using the alkalimetal ion pricrate
据报道,某些癌细胞中存在着碱金属离子水平升高的情况,将特定碱金属离子的分子识别与DNA损伤相结合的化合物可能会显示DNA的选择性裂解。我们制备了一系列同源化合物,其中将DNA反应性部分双(炔丙基)砜掺入与碱金属离子结合的冠醚环中。使用碱金属离子多价萃取法测定这些冠醚结合Li(+),Na(+)和K(+)离子的能力。对于一系列冠醚,Li(+)离子的缔合常数通常较低(<2 x 10(4)M(-1))。只有两个双(炔丙基)砜冠醚与Na(+)或K(+)离子缔合(K(a)4-8 x 10(4)M(-1)),而Na(+ )或K(+)离子。确定了这些化合物在存在Li(+),Na(+)和K(+)离子的情况下在pH 7.4时切割超螺旋DNA的能力。与Na(+)和K(+)相比,在存在Na(+)或K(+)离子的情况下,结合Na(+)和K(+)的两个冠醚显示DNA裂解效率的适度提高。与非冠醚大环双(炔丙基)砜相比,
Kerwin Sean Michael, Tetrahedron Lett, 35 (1994) N 7, S 1023-1026
作者:Kerwin Sean Michael
DOI:——
日期:——
Synthesis of a DNA-cleaving bis(propargylic) sulfone crown ether
作者:Sean Michael Kerwin
DOI:10.1016/s0040-4039(00)79955-2
日期:1994.2
The prototypical bis(propargylic) sulfone crownether 5 was synthesized in six steps and 26 % overall yield from readily available starting materials. In alkaline aqueous buffer, compounds 5 cleaves supercoiled DNA.