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XB-ART-59236
Chem Sci 2022 Jun 02;1325:7462-7467. doi: 10.1039/d2sc02364d.
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Efficient visible/NIR light-driven uncaging of hydroxylated thiazole orange-based caged compounds in aqueous media.

Hashimoto R , Minoshima M , Sakata S , Ono F , Ishii H , Watakabe Y , Nemoto T , Yanaka S , Kato K , Kikuchi K .


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In photoactivation strategies with bioactive molecules, one-photon visible or two-photon near-infrared light-sensitive caged compounds are desirable tools for biological applications because they offer reduced phototoxicity and deep tissue penetration. However, visible-light-sensitive photoremovable protecting groups (PPGs) reported so far have displayed high hydrophobicity and low uncaging cross sections (εΦ < 50) in aqueous media, which can obstruct the control of bioactivity with high spatial and temporal precision. In this study, we developed hydroxylated thiazole orange (HTO) derivatives as visible-light-sensitive PPGs with high uncaging cross sections (εΦ ≈ 370) in aqueous solution. In addition, 2PE photolysis reactions of HTO-caged glutamate were achieved using a NIR laser (940 nm). Moreover, HTO-caged glutamate can activate N-methyl-d-aspartic acid receptors in Xenopus oocytes and mammalian cells with green-light illumination, thus allowing optical control of biological functions.

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References [+] :
Davis, Substituent effects on the sensitivity of a quinoline photoremovable protecting group to one- and two-photon excitation. 2009, Pubmed