2402-78-0Relevant articles and documents
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McKendry,Muelder
, p. 87,94 (1978)
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Catalyst-Free N-Deoxygenation by Photoexcitation of Hantzsch Ester
Cardinale, Luana,Jacobi Von Wangelin, Axel,Konev, Mikhail O.
supporting information, (2020/02/15)
A mild and operationally simple protocol for the deoxygenation of a variety of heteroaryl N-oxides and nitroarenes has been developed. A mixture of substrate and Hantzsch ester is proposed to result in an electron donor-acceptor complex, which upon blue-light irradiation undergoes photoinduced electron transfer between the two reactants to afford the products. N-oxide deoxygenation is demonstrated with 22 examples of functionally diverse substrates, and the chemoselective reduction of nitroarenes to the corresponding hydroxylamines is also shown.
Pyridine liquid phase light chlorinated preparation 2, 6 - dichloro pyridine method
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Paragraph 0012-0035, (2019/07/05)
The invention relates to a kind of the trifluoromethyl chlorobenzene as the solvent, 2 - chloro pyridine and chlorine as the raw material, process for preparing the product purity ≥ 99.0% of 2, 6 - dichloro pyridine production method, in order to 2 - chloro pyridine, chlorine as the starting material, trifluoromethyl chlorobenzene as the solvent, in the 150 °C -200 °C temperature, ultraviolet light irradiation under the continuous feed of the liquid phase chlorination reaction, to obtain the chloride, wherein the chloride in pyridine 2, 6 - dichloro pyridine content ≥ 97%, chlorinated rough steaming, crystallization separation or distillation purification process, get the purity ≥ 99.0% of 2, 6 - chlorinate, yield is greater than 90%. Advantages: produced by the reaction of 2, 6 - dichloro pyridine high selectivity, adding solvent to the reaction device overcomes the problem of exhaust gas easy blockage of the pipe, reaction process is easy to control, help to realize commercial process.