95-50-1Relevant articles and documents
Lu,Sugden
, p. 1273,1275 (1939)
A method for producing o-dichlorobenzene by one-pot method of o-nitrochlorobenzene as raw material
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Paragraph 0019-0025, (2022/01/05)
The present invention relates to a method for producing o-dichlorobenzene by a pot method of producing o-nitrochlorobenzene as raw material. Based on a continuous reactor, the continuous reactor is a reaction device connected to the reaction kettle and the catalyst packing tower, the opening of the reaction kettle is directly connected to the inlet at the bottom of the tower, the reaction kettle is provided with a feeding port and an aeration port, the catalyst packing tower top is provided with a gas inlet outlet, o-nitrochlorobenzene and continuously passed chlorine as raw material, with peroxide and azode complex catalyst as the catalyst, at 225-255 ° C, 0.11- Under the condition of 0.15Mpa, the denitrochlorination reaction was carried out in a continuous reactor to generate o-dichlorobenzene and tail gas nitrate chloride, and o-dichlorobenzene was elicitated from the top outlet of the tower along with the tail gas nitrate chloride, and the liquid o-dichlorobenzene, o-dichlorobenzene and tail gas nitroyl chloride were condensed to a residence time of 5-20min in the catalyst packing column. The high-temperature, short-term synthesis of o-dichlorobenzene, energy consumption is significantly reduced, there are few by-products, no isomers, and the conversion rate is high, up to 95%.
The graphite-catalyzed: ipso -functionalization of arylboronic acids in an aqueous medium: metal-free access to phenols, anilines, nitroarenes, and haloarenes
Badgoti, Ranveer Singh,Dandia, Anshu,Parewa, Vijay,Rathore, Kuldeep S.,Saini, Pratibha,Sharma, Ruchi
, p. 18040 - 18049 (2021/05/29)
An efficient, metal-free, and sustainable strategy has been described for the ipso-functionalization of phenylboronic acids using air as an oxidant in an aqueous medium. A range of carbon materials has been tested as carbocatalysts. To our surprise, graphite was found to be the best catalyst in terms of the turnover frequency. A broad range of valuable substituted aromatic compounds, i.e., phenols, anilines, nitroarenes, and haloarenes, has been prepared via the functionalization of the C-B bond into C-N, C-O, and many other C-X bonds. The vital role of the aromatic π-conjugation system of graphite in this protocol has been established and was observed via numerous analytic techniques. The heterogeneous nature of graphite facilitates the high recyclability of the carbocatalyst. This effective and easy system provides a multipurpose approach for the production of valuable substituted aromatic compounds without using any metals, ligands, bases, or harsh oxidants.