Design and Synthesis of a Fluorescent Probe for Zn<sup>2+</sup>, 5,7-Bis(<i>N</i>,<i>N</i>-dimethylaminosulfonyl)-8-hydroxyquinoline-Pendant 1,4,7,10-Tetraazacyclododecane and Zn<sup>2+</sup>-Dependent Hydrolytic and Zn<sup>2+</sup>-Independent Photochemical Reactivation of Its Benzenesulfonyl-Caged Derivative
作者:Ryosuke Ohshima、Masanori Kitamura、Akinori Morita、Motoo Shiro、Yasuyuki Yamada、Masahiko Ikekita、Eiichi Kimura、Shin Aoki
DOI:10.1021/ic901279t
日期:2010.2.1
10-tetraazacyclododecane) and its caged derivative, 8-(benzenesulfonyloxy)-5-(N,N-dimethylaminosulfonyl)quinolin-2-ylmethyl-pendant cyclen (BS-caged-L5), which can be reactivated by hydrolysis of benzenesulfonyl group upon complexation with Zn2+ at neutral pH to give a 1:1 Zn2+−L5 complex (Zn(H−1L5)). We report herein on the synthesis of 5,7-bis(N,N-dimethylaminosulfonyl)-8-hydroxyquinolin-2-ylmethyl-pendant cyclen
我们之前曾报道过一种8-喹啉-侧链环素(L 5),其为Zn 2+荧光团(环素= 1,4,7,10-四氮杂环十二烷)及其笼形衍生物8-(苯磺酰氧基)-5-(N,N-二甲基氨基磺酰基)喹啉-2-基甲基悬垂环素(BS-Caged-L 5),在中性pH下与Zn 2+络合后可通过苯磺酰基水解而重新活化,得到1:1 Zn 2+ -L 5络合物(Zn(H -1 L 5))。我们在此报告5,7-双(N,N-二甲基氨基磺酰基)-8-羟基喹啉-2-基甲基侧链环的合成(L 6)及其笼形导数(BS-caged-L 6),从而比L 5和BS-caged-L 5更为敏感和更有效的细胞膜通透性。通过电位pH值,1 H NMR和UV-vis光谱滴定,确定H 5 L 6的去质子常数p K a1 -p K a6为<2,<2,<2、2.5±0.1(对于8在25°C下I = 0.1(NaNO 3)时,喹啉部分的-OH基团)分别为9