Base-Mediated Meerwein–Ponndorf–Verley Reduction of Aromatic and Heterocyclic Ketones
作者:Timothy B. Boit、Milauni M. Mehta、Neil K. Garg
DOI:10.1021/acs.orglett.9b02342
日期:2019.8.16
Meerwein-Ponndorf-Verley (MPV) reduction of ketones under mildly basic conditions is reported. The transformation is tolerant of a range of ketone substrates, including O- and S-containing heterocycles, is scalable, and shows potential to be used as a platform to access enantioenriched products. These studies provide a general method for achieving the reduction of ketones under mildly basic conditions
Economical Access to Diverse Enantiopure Tetrahydropyridines and Piperidines Enabled by Catalytic Borrowing Hydrogen
作者:Teng Wei Ng、Ran Tao、Willy Wei Li See、Si Bei Poh、Yu Zhao
DOI:10.1002/anie.202212528
日期:2023.1.9
An unprecedented, economical one-pot access to enantiopure N−H tetrahydropyridines is achieved by coupling a few readily available substrates with commercially available 1,3-amino alcohols via catalyticborrowinghydrogen. Highly diastereoselective functionalizations of tetrahydropyridines also result in a general access to enantiopure di- and tri-substituted piperidines, which rank among the most