synthetically versatile tetrahydroquinoline molecules with I2 and HBpin is described. In the presence of iodine (20 mol%) as a catalyst, reduction of quinolines and other N-heteroarenes proceeded readily with hydroboranes as the reducing reagents. The broad functional-group tolerance, good yields and mild reaction conditions imply high practical utility.
An efficient catalytic method is presented for the hydrogenation of N‐heterocycles. The iridium‐based catalyst operates under mild conditions in water without any co‐catalyst or stoichiometric additives. The catalyst also promotes the reverse reaction of dehydrogenation of N‐heterocycles, hence displaying appropriate characteristics for a future hydrogen economy based on liquid organic hydrogen carriers
Boric acid catalyzed chemoselective reduction of quinolines
作者:Dipanjan Bhattacharyya、Sekhar Nandi、Priyanka Adhikari、Bikash Kumar Sarmah、Monuranjan Konwar、Animesh Das
DOI:10.1039/c9ob02673h
日期:——
Boricacid promoted transfer hydrogenation of substituted quinolines to synthetically versatile 1,2,3,4-tetrahydroquinolines (1,2,3,4-THQs) was described under mild reaction conditions using a Hantzsch ester as a mild organic hydrogen source. This methodology is practical and efficient, where isolated yields are excellent and reducible functional groups are well tolerated in the N-heteroarene moiety