Organoselenium-Catalyzed, Hydroxy-Controlled Regio- and Stereoselective Amination of Terminal Alkenes: Efficient Synthesis of 3-Amino Allylic Alcohols
摘要:
An efficient route to prepare 3-amino allylic alcohols in excellent regio- and stereoselectivity in the presence of bases by orangoselenium catalysis has been developed. In the absence of bases alpha,beta-unsaturated aldehydes were formed in up to 97% yield. Control experiments reveal that the hydroxy group is crucial for the direct amination.
Organocatalytic Access to Enantioenriched Dihydropyran Phosphonates via an Inverse-Electron-Demand Hetero-Diels–Alder Reaction
作者:Christian F. Weise、Vibeke H. Lauridsen、Raoní S. Rambo、Eva H. Iversen、Marie-Luise Olsen、Karl Anker Jørgensen
DOI:10.1021/jo500347a
日期:2014.4.18
hetero-Diels–Alder reaction of the remote olefin functionality in dienamines has been developed by the simultaneous activation of α,β-unsaturated aldehydes and acyl phosphonates. The dual activation is based on an organocatalyst that activates both the α,β-unsaturated aldehyde, through dienamine formation, and the acyl phosphonate by hydrogen-bonding. The enantioselective reaction results in the formation
Large‐Scale Synthesis of a Niche Olefin Metathesis Catalyst Bearing an Unsymmetrical N‐Heterocyclic Carbene (NHC) Ligand and its Application in a Green Pharmaceutical Context
large‐scale synthesis of known Ru olefinmetathesis catalyst VII featuring an unsymmetrical N‐heterocyclic carbene (NHC) ligand with one 2,5‐diisopropylphenyl (DIPP) and one thiophenylmethylene N‐substituent is reported. The optimised procedure does not require column chromatography in any step and allows for preparation of up to 0.5 kg batches of the catalyst from simple precursors. The application profile
Organocatalytic Asymmetric Multicomponent Cascade Reaction for the Synthesis of Contiguously Substituted Tetrahydronaphthols
作者:Yidong Liu、Joseph A. Izzo、David McLeod、Sebastijan Ričko、Esben B. Svenningsen、Thomas B. Poulsen、Karl Anker Jørgensen
DOI:10.1021/jacs.1c03923
日期:2021.6.2
unique, highly reactive, aromatic intermediates which are largely unexplored in asymmetric catalysis despite their high potential synthetic utility. In this study, an organocatalytic asymmetric multicomponent cascade via dienamine catalysis, involving a cycloaddition, a nucleophilic addition, and a ring-opening reaction, is disclosed. The reaction furnishes chiral tetrahydronaphthols containingfour contiguous
PYRIDINE AND PYRIMIDINE DERIVATIVES AS MGLUR2 ANTAGONISTS
申请人:F. Hoffmann-La Roche AG
公开号:EP2001849A1
公开(公告)日:2008-12-17
[EN] PYRIDINE AND PYRIMIDINE DERIVATIVES AS MGLUR2 ANTAGONISTS<br/>[FR] DERIVES DE PYRIDINE ET DE PYRIMIDINE EN TANT QU'ANTAGONISTES DE MGLUR2
申请人:HOFFMANN LA ROCHE
公开号:WO2007110337A1
公开(公告)日:2007-10-04
[EN] The present invention relates to compounds of formula (I), a process for the manufacture thereof, their use for the preparation of medicaments for treating CNS disorders and pharmaceutical compositions containing them: wherein A, B, X, Y, R1, R2, R3 and R4 are as defined in the description and claims. [FR] La présente invention concerne des composés de formule (I), un procédé de fabrication de ces composés, leur utilisation pour la préparation de médicaments pour le traitement de troubles du SNC et des compositions pharmaceutiques les contenant : dans laquelle A, B, X, Y, R1, R2, R3 et R4 sont tels que définis dans la description et dans les revendications.