[EN] TETRAHYDROPYRIDOPYRIMIDINES AND TETRAHYDROPYRIDOPYRIDINES AS INHIBITORS OF HBSAG (HBV SURFACE ANTIGEN) AND HBV DNA PRODUCTION FOR THE TREATMENT OF HEPATITIS B VIRUS INFECTIONS<br/>[FR] TÉTRAHYDROPYRIDOPYRIMIDINES ET TÉTRAHYDROPYRIDOPYRIDINES COMME INHIBITEURS D'AG HBS (ANTIGÈNE DE SURFACE DU VIRUS DE L'HÉPATITE B) ET PRODUCTION D'ADN DE VHB POUR LE TRAITEMENT D'INFECTIONS PAR LE VIRUS DE L'HÉPATITE B
申请人:HOFFMANN LA ROCHE
公开号:WO2016177655A1
公开(公告)日:2016-11-10
The present invention provides tetrahydropyridopyrimidines and tetrahydropyridopyridines having the general formula (I) wherein R1, R2, U, W, X, Y and Z are as described herein, as inhibitors of HBsAg (HBV surface antigen) and HBV DNA production for the treatment and prophylaxis of hepatitis B virus infections.
Enantioselective N-Heterocyclic Carbene Catalyzed Synthesis of Functionalized Indenes
作者:Changhe Zhang、David W. Lupton
DOI:10.1021/acs.orglett.7b01981
日期:2017.9.1
An enantioselective NHC (N-heterocycliccarbene) catalyzed synthesis of indenes from bifunctional α,β-unsaturated acyl fluorides and TMS enol ethers has been discovered. The reaction has broad generality (31 examples) and proceeds with high levels of enantioselectivity (most >92:8 er). Mechanistically the reaction likely occurs via a Michael/β-lactonization/decarboxylation sequence. Derivatization
Total Synthesis of Gelsemoxonine through a Spirocyclopropane Isoxazolidine Ring Contraction
作者:Stefan Diethelm、Erick M. Carreira
DOI:10.1021/jacs.5b02574
日期:2015.5.13
of this plant incorporating a highlyfunctionalized azetidine at its core. We herein report a full account of our studies directed toward the totalsynthesis of gelsemoxonine that relies on a conceptually new approach for the construction of the central azacyclobutane. A spirocyclopropane isoxazolidine ring contraction was employed to access a key β-lactam intermediate, which could be further elaborated
A newmethod for the catalytic aldol reaction to ketones, using CuF.3PPh3.2EtOH complex as the catalyst and (EtO)3SiF as the additive, is described. The reaction can be applied to a wide range of ketones and trimethylsilyl enolates. On the basis of mechanistic studies, a working hypothesis for the catalytic cycle is proposed, in which the dynamic ligand exchange mediated by copper silicates produces
modern organic synthesis, chemoselectivity is recognized as an important factor in the development of new methodologies. Chemoselective nucleophilic addition to amide carbonyl centers is a challenge because classical methods require harsh reaction conditions to overcome the poor electrophilicity of the amide carbonyl group. We have successfully developed a reductive nucleophilic addition of mild nucleophiles