Regioselective mono-2-O-sulfonation of cyclomaltooctaose was conveniently achieved by using the combination of sulfonyl imidazole and molecular sieves in DMF. In this reaction, no 3-O- or 6-O-sulfonation products were produced. The reactions do not require strict anhydrous or basic conditions, or specific sulfonyl groups.
Therapeutic Potential of Two Visible Light Responsive Luminescent photoCORMs: Enhanced Cellular Internalization Driven by Lipophilicity
作者:Miguel N. Pinto、Indranil Chakraborty、Jorge Jimenez、Katelyn Murphy、John Wenger、Pradip K. Mascharak
DOI:10.1021/acs.inorgchem.9b02121
日期:2019.11.4
colorectal adenocarcinoma (HT-29) cells compared to [Mn(CO)3(Imdansyl)(L2)](CF3SO3) (2) (where L2 = a diazabutadiene ligand bearing two hydrophilic 1,3,5-triazaadamantyl group). Colocalization experiments using membrane stain indicate different extents of localization of the two COcomplexes within the cellular matrix. Visible-light triggeredCOrelease from the lipophilic photoCORM induced caspase-3/7 activation
在这里,我们报告了两种可见光活性发光锰基photoCORMs的合成,表征和细胞内在化特性。由设计亲脂性配体即[Mn(CO)3(Imdansyl)(L1)](CF 3 SO 3)(1)(其中L1 =二氮杂丁二烯-与[Mn(CO)3(Imdansyl)(L2)](CF 3 SO 3)(2)(其中L2 =带有两个亲水的1,3,5-三氮杂金刚烷基的二氮杂丁二烯配体)。使用膜染色剂的共定位实验表明,两种CO复合物在细胞基质中的定位程度不同。可见光触发从亲脂性photoCORM释放的CO诱导HT-29细胞上的caspase-3 / 7活化,这是用共聚焦显微镜检测到的。与亲水类似物2相比,亲脂性photoCORM 1在细胞膜中的快速积累导致更有效的CO诱导的细胞死亡。
A Luminescent Manganese PhotoCORM for CO Delivery to Cellular Targets under the Control of Visible Light
作者:Jorge Jimenez、Indranil Chakraborty、Annmarie Dominguez、Jorge Martinez-Gonzalez、W. M. Chamil Sameera、Pradip K. Mascharak
DOI:10.1021/acs.inorgchem.7b02480
日期:2018.2.19
first luminescent manganese carbonyl-based photoCORM reported in the literature. This complex exhibits CO release under the exclusive control of low-power broadband visible light. The corresponding rhenium carbonyl complex, namely, [Re(Imdansyl)(CO)3(phen)](CF3SO3) (2), has also been reported, which is luminescent but sensitive only to UV-B (λ<315 nm) light. The entry of the manganese photoCORM into
合成了由丹西咪唑(Imdansyl)衍生的光活性羰基锰配合物,即[Mn(Imdansyl)(CO)3(phen)](CF 3 SO 3)(1),并对其结构进行了表征。这是文献中首次报道的基于发光锰羰基的photoCORM。该复合物在低功率宽带可见光的唯一控制下展现出CO释放。相应的羰基rh络合物,即[Re(Imdansyl)(CO)3(phen)](CF 3 SO 3)(2),也有报道,它是发光的,但仅对UV-B(λ<315 nm)光敏感。借助于荧光显微镜已经证明了锰photoCORM进入人结肠直肠腺癌细胞(HT-29)。将装载有光CORM的癌细胞照射到可见光下会导致剂量依赖性凋亡细胞死亡。
A photosensitive {Ru–NO}6 nitrosyl bearing dansyl chromophore: novel NO donor with a fluorometric on/off switch
作者:Michael J. Rose、Pradip K. Mascharak
DOI:10.1039/b805332d
日期:——
The synthesis, fluorescence properties and NO photolability of [(Me2bpb)Ru(NO)(Ds-im)]BF4, a RuâNO}6nitrosylâfluorophore conjugate, have been investigated and its potential as a trackable NO donor has been evaluated.