10.1021/ja406761j.s001 Yongbing Liu Yongbing Liu Haifeng Du Haifeng Du Metal-Free Borane-Catalyzed Highly Stereoselective Hydrogenation of Pyridines American Chemical Society 2013 Stereoselective Hydrogenation HB cis stereoselectivities piperidine hydrogenation alkene hydroboration pyridine PyridinesA yield borane catalysts 2013-09-04 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Metal_Free_Borane_Catalyzed_Highly_Stereoselective_Hydrogenation_of_Pyridines/2381425 A metal-free direct hydrogenation of pyridines was successfully realized by using homogeneous borane catalysts generated from alkenes and HB­(C<sub>6</sub>F<sub>5</sub>)<sub>2</sub> via in situ hydroboration. The reaction affords a broad range of piperidines in high yields with excellent cis stereoselectivities.