Chemistry is traditionally divided into organic and inorganic chemistry. Recommanded Product: Isoquinoline N-Oxide, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 1532-72-5
In this paper, we report a highly selective and widely applicable method for deoxygenation of pyridine N-oxides using ethanol as the reducing agent through the visible-light-responsive photoredox catalysis of a divacant lacunary silicotungstate TBA4H4[gamma-SiW10O36] (I, TBA=tetra-n-butylammonium). By irradiation with visible light (lambda > 385 nm), the two-electron and two-proton transfers from the coordinated ethanol to I efficiently took place. Then, the transiently stored electrons and protons within I could be effectively utilized for the selective deoxygenation of pyridine N-oxides. Various kinds of structurally diverse pyridine N-oxides could be converted into the corresponding substituted pyridines in high yields, even in the presence of other reducible functional groups, such as olefinic, chloro, cyano, carbonyl, and amide groups. In addition, I could be readily retrieved after the reaction, and the retrieved I could be reused with keeping its high catalytic performance. The lacunary site of I played an important dual role as the electron transfer site from ethanol to I and the selective electron transfer site from the reduced I to pyridine N-oxides.
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Reference：
Isoquinoline – Wikipedia,
Isoquinoline | C9H514N – PubChem