om9b00475_si_001.pdf (1.89 MB)
Manganese(I)-Catalyzed Transfer Hydrogenation and Acceptorless Dehydrogenative Condensation: Promotional Influence of the Uncoordinated N‑Heterocycle
journal contribution
posted on 2019-08-14, 17:37 authored by Chong Zhang, Bowen Hu, Dafa Chen, Haiping XiaThe four bidentate manganese(I) complexes
[(C5H4N-C5H3N-OH)Mn(CO)3Br] (1), [(C9H6N-C5H3N-OH)Mn(CO)3Br] (2),
[(C8H5N2-C5H3N-OH)Mn(CO)3Br] (3), and [(C8H5N2-C5H3N-OCH3)Mn(CO)3Br]
(4) were synthesized. These complexes were tested as
catalysts for the transfer hydrogenation of ketones, and 3 showed the highest activity. The reactions proceeded well with 0.5
mol % of catalyst loading and 20 mol % of t-BuOK
at 85 °C for 24 h. Furthermore, 3 was also used
as a catalyst for the synthesis of primary alcohols via transfer hydrogenation
of aldehydes and the synthesis of 1,2-disubstituted benzimidazoles
and quinolines via acceptorless dehydrogenative condensations.