Catalytic Asymmetric Synthesis of Cyclohexanes by Hydrogen Borrowing Annulations
作者:Roly J. Armstrong、Wasim M. Akhtar、Tom A. Young、Fernanda Duarte、Timothy J. Donohoe
DOI:10.1002/anie.201907514
日期:2019.9.2
Hydrogen borrowing catalysis serves as a powerful alternative to enolate alkylation, enabling the direct coupling of ketones with unactivated alcohols. However, to date, methods that enable control over the absolute stereochemical outcome of such a process have remained elusive. Here we report a catalytic asymmetric method for the synthesis of enantioenriched cyclohexanes from 1,5‐diols via hydrogen
Copper-catalyzed enantioselective alkene carboetherification for the synthesis of saturated six-membered cyclic ethers
作者:Ilyas A. Berhane、Ameya S. Burde、Jonathan J. Kennedy-Ellis、Eva Zurek、Sherry R. Chemler
DOI:10.1039/d1cc03515k
日期:——
The enantioselective copper-catalyzed oxidative coupling of alkenols with styrenes for the construction of dihydropyrans, isochromans, pyrans and morpholines is reported. A concise formal synthesis of a σ1 receptor ligand using this alkene carboetherification methodology was demonstrated. Ligand, solvent and base all impact reaction efficiency. DFT transition state calculations are presented.
[EN] PYRAZOLO[1,5-A]PYRIMIDINYL CARBOXAMIDE COMPOUNDS AND THEIR USE IN THE TREATMENT OF MEDICAL DISORDERS<br/>[FR] COMPOSÉS DE PYRAZOLO[1,5-A]PYRIMIDINYL CARBOXAMIDE ET LEUR UTILISATION DANS LE TRAITEMENT DE TROUBLES MÉDICAUX
申请人:LYSOSOMAL THERAPEUTICS INC
公开号:WO2017176960A1
公开(公告)日:2017-10-12
The invention provides substituted pyrazolo[1,5-a]pyrimidinyl carboxamide and related organic compounds, compositions containing such compounds, medical kits, and methods for using such compounds and compositions to treat medical disorders, e.g., Gaucher disease, Parkinson's disease, Lewy body disease, dementia, or multiple system atrophy, in a patient. Exemplary substituted pyrazolo[1,5-a]pyrimidinyl carboxamide compounds described herein include 2-heterocyclyl-4-alkyl-pyrazolo[1,5-a]pyrirnidine-3-carboxarnide compounds and variants thereof.
A Total Synthesis of (±)-Ceratopicanol via Palladium Catalyzed Reductive Cyclization
作者:Rira Kim、Sanghyeon Lee、Jaeyeon Lee、Hee-Yoon Lee
DOI:10.1002/ejoc.202000769
日期:2020.8.23
An efficient totalsynthesis of ceratopicanol was achieved through successive Pd catalyzed reductive cycloaddition and cyclization reactions. The Pd mediated cyclization reaction to form a triquinane structure demonstrated that a small structural difference changed the reaction pathway either to form different structures or reduced non‐cyclized product depending on the reaction conditions.
Primary Anion–π Catalysis of Epoxide‐Opening Ether Cyclization into Rings of Different Sizes: Access to New Reactivity
作者:Miguel Paraja、Stefan Matile
DOI:10.1002/anie.202000579
日期:2020.4.6
a promise anion-πcatalysis has been reluctant to live up to. Herein, we report non-trivial reactions that work with anion-πcatalysis, but not with Brønsted acids, under comparable conditions. Namely, we show that the anion-π templated autocatalysis and epoxide opening with alcoholate-π interactions can provide access to unconventional ring chemistry. For smaller rings, anion-πcatalysis affords anti-Baldwin