Metal-Free Borane-Catalyzed Highly Stereoselective Hydrogenation of Pyridines
摘要:
A metal-free direct hydrogenation of pyridines was successfully realized by using homogeneous borane catalysts generated from alkenes and HB(C6F5)(2) via in situ hydroboration. The reaction affords a broad range of piperidines in high yields with excellent cis stereoselectivities.
protocol for the reductive functionalization of amides into N‐sulfonylformamidines is reported. The one‐pot procedure is based on a mild catalyticreduction of tertiary amides into the corresponding enamines by the use of Mo(CO)6 (molybdenum hexacarbonyl) and TMDS (1,1,3,3‐tetramethyldisiloxane). The formed enamines were allowed to react with sulfonyl azides to give the target compounds in moderate to