Visible-Light-Promoted Diboron-Mediated Transfer Hydrogenation of Azobenzenes to Hydrazobenzenes
Menghui Song, Hongyan Zhou, Ganggang Wang, Ben Ma, Yajing Jiang, Jingya Yang*, Congde Huo and Xi-Cun Wang*
*College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China,
Email: yangjynwnu.edu.cn, wangxicun
nwnu.edu.cn
M. Song, H. Zhou, G. Wang, B. Ma, Y. Jiang, J. Yang, C. Huo, X.-C. Wang, J. Org. Chem., 2021, 86, 4804-4811.
DOI: 10.1021/acs.joc.1c00394
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Abstract
A visible-light-promoted transfer hydrogenation of azobenzenes proceeds smoothly in methanol at ambient temperature in the presence of B2pin2 through a radical pathway. The reaction reduces a broad range of azobenzenes to the corresponding hydrazobenzenes in very good yields.
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proposed mechanism
Key Words
reduction of azocompounds, bis(pinacolato)diboron, photochemistry
ID: J42-Y2021