Green Route for the Preparation of p-Aminophenol from Nitrobenzene by Catalytic Hydrogenation in Pressurized CO2/H2O System

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• 作者：Tingting Zhang ; Jingyang Jiang ; Yanhua Wang
• 刊名：Organic Process Research & Development
• 出版年：2015
• 出版时间：December 18, 2015
• 年：2015
• 卷：19
• 期：12
• 页码：2050-2054
• 全文大小：286K
• ISSN：1520-586X

文摘

The preparation of p-aminophenol from nitrobenzene by one-pot catalytic hydrogenation and in situ acid-catalyzed Bamberger rearrangement was first realized in a pressurized CO₂/H₂O system. By employing Pt鈥揝n/Al₂O₃ as catalyst, nitrobenzene could be converted to p-aminophenol with selectivity as high as 85% when the reaction was carried out at 140 掳C under 5.5 MPa CO₂ and 0.2 MPa H₂. This new protocol is environmentally benign because it is fully rid of the use of mineral acid by the application of self-neutralizable carbonic acid.