Co–Nx catalyst: an effective catalyst for the transformation of nitro compounds into azo compounds. Issue 1 (13th October 2020)

• Record Type: Journal Article
• Authors: Huang, Renjie; Wang, Yanxin; Liu, XiXi; Zhou, Peng; Jin, Shiwei; Zhang, Zehui
• Is Part Of: Reaction chemistry & engineering. Volume 6:Issue 1(2021)
• Page Start: 112
• Page End: 118
• Publication Date: 2020-10-13
• Subjects: Reaction mechanisms (Chemistry) -- Periodicals; Chemical engineering -- Periodicals; Chemical engineering; Reaction mechanisms (Chemistry); Periodicals; 547.705
• DOI: 10.1039/d0re00222d
• Languages: English
• ISSNs: 2058-9883

Abstract

Abstract : The selective hydrogenation of nitro compounds into their corresponding azo compounds is challenging in organic synthesis. Abstract : The selective hydrogenation of nitro compounds into their corresponding azo compounds is challenging in organic synthesis. In this study, we have developed a facile and efficient catalytic system for the transformation of nitro compounds into azo compounds under mild conditions over a heterogeneous cobalt catalyst (Co–N x /C-800-AT). The Co–N x /C-800-AT catalyst was found to be highly active for the reductive-coupling of nitro compounds into azo compounds in ethanol at 110 °C and 2.5 bar H2 pressure with the addition of NaOH as an additive, affording structurally-diverse azo compounds with satisfactory yields (70.4–98.3%). The developed method demonstrated several advantages such as high catalytic activity and high selectivity with tolerance to other functional groups and high stability.