Catalytic Asymmetric Hydrogenation of Tetrasubstituted Unsaturated Lactams: An Efficient Approach to Enantioenriched 3,4-Disubstituted Piperidines
作者:Congcong Yin、Yingmin Pan、Xumu Zhang、Qin Yin
DOI:10.1021/acs.orglett.1c04132
日期:2022.1.21
Asymmetrichydrogenation of tetrasubstituted alkenes remains a formidable challenge in asymmetric catalysis. We report herein an unprecedented Rh-catalyzed enantioselective and diastereoselective hydrogenation of easily accessed α,β-disubstituted unsaturated lactams to afford synthetically valuable chiral lactams with 1,2-consecutive stereocenters. The reaction could be performed on the gram scale
The present invention relates to an isotopologue of paroxetine substituted with deuterium at the methylene carbon of the benzodioxol ring. The isotopologues of this invention selective serotonin reuptake inhibitors (SSRIs) and possess unique biopharmaceutical and metabolic properties compared to paroxetine. They may also be used to accurately determine the concentration of paroxetine in biological fluids and to determine metabolic patterns of paroxetine and its isotopologues. The invention further provides compositions comprising these deuterated isotopologues and methods of treating diseases and conditions that are responsive to increased neuronal serotonin transmission, alone and in combination with additional agents.
The present invention relates to an isotopologue of Compound 1 substituted with deuterium at the methylene carbon of the benzodioxol ring. The isotopologues of this invention selective serotonin reuptake inhibitors (SSRIs) and possess unique biopharmaceutical and metabolic properties compared to Compound 1. They may also be used to accurately determine the concentration of Compound 1 in biological fluids and to determine metabolic patterns of Compound 1 and its isotopologues. The invention further provides compositions comprising these deuterated isotopologues and methods of treating diseases and conditions that are responsive to increased neuronal serotonin transmission, alone and in combination with additional agents.
Catalytic Enantioselective Conjugate Reduction of Lactones and Lactams
作者:Gregory Hughes、Masanari Kimura、Stephen L. Buchwald
DOI:10.1021/ja0351692
日期:2003.9.1
A dramatic acceleration of the enantioselective copper-catalyzed conjugatereduction of alpha,beta-unsaturated lactones, lactams, and esters is reported upon addition of alcohol additives. Good to excellent yields and enantioselectivities were realized using a catalyst generated in situ from CuCl(2).H(2)O, t-BuONa, p-tol-BINAP, and PMHS, and this methodology was applied to the synthesis of (-)-Paroxetine