CC BY 4.0 · Synthesis 2022; 54(03): 629-642
DOI: 10.1055/a-1654-3302
feature

Heterogeneous Hydrogenation of Quinoline Derivatives Effected by a Granular Cobalt Catalyst

Daniel Timelthaler
,
Christoph Topf
Financial support was provided by the Austrian Science Fund (FWF), Standalone Project P 32045 ‘Metallocorrole-Based Catalysts for Biomass Valorization’. For the purpose of open access, the author has applied a CC BY 4.0 public copyright license to any Author Accepted Manuscript version arising from this submission.


Abstract

We communicate a convenient method for the pressure hydrogenation of quinolines in aqueous solution by using a particulate cobalt-based catalyst that is prepared in situ from simple Co(OAc)2·4H2O through reduction with abundant zinc powder. This catalytic protocol permits a brisk and atom-efficient access to a variety of 1,2,3,4-tetra­hydroquinolines thereby relying solely on easy-to-handle reagents that are all readily obtained from commercial sources. Both the reaction setup assembly and the autoclave charging procedure are conducted on the bench outside an inert-gas-operated containment system, thus rendering the overall synthesis time-saving and operationally very simple.

Supporting Information



Publication History

Received: 09 July 2021

Accepted after revision: 14 September 2021

Accepted Manuscript online:
27 September 2021

Article published online:
10 November 2021

© 2021. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by/4.0/)

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany