Catalytic Allylic Oxidation to Generate Vinylogous Acyl Sulfonates from Vinyl Sulfonates
作者:James K. Tucker、Matthew D. Shair
DOI:10.1021/acs.orglett.9b00845
日期:2019.4.5
formation of vinylogous acyl sulfonates was accomplished via the allylic oxidation of the corresponding vinyl sulfonates. The reaction progressed through the agency of catalytic iron(III) chloride catalysis with tert-Butyl hydroperoxide (TBHP) as the stoichiometric oxidant. Tolerance of other functional groups, including some other allylic and benzylic sites, was observed.
[EN] COMPOUNDS FOR THE REDUCTION OF ß-AMYLOID PRODUCTION<br/>[FR] COMPOSÉS POUR LA RÉDUCTION DE LA PRODUCTION DE ß-AMYLOÏDE
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2012103297A1
公开(公告)日:2012-08-02
The present disclosure provides a series of compounds of the formula (I), which modulate β-amyloid peptide (β-ΑΡ) production and are useful in the treatment of Alzheimer's Disease and other conditions affected by β-amyloid peptide (β-ΑΡ) production.
[EN] COMPOUNDS FOR THE REDUCTION OF ß-AMYLOID PRODUCTION<br/>[FR] COMPOSÉS DESTINÉS À LA RÉDUCTION DE LA PRODUCTION DE BETA-AMYLOÏDES
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2011014535A1
公开(公告)日:2011-02-03
The present disclosure provides a series of compounds of the formula (I) which modulate β-amyloid peptide (β-AP) production and are useful in the treatment of Alzheimer's Disease and other conditions affected by β-amyloid peptide (β-AP) production.
Highly Efficient and Enantioselective α-Arylation of Cycloalkanones by Scandium-Catalyzed Diazoalkane-Carbonyl Homologation
作者:Jason Kingsbury、Victor Rendina、Hilan Kaplan
DOI:10.1055/s-0031-1289650
日期:2012.3
Functionalized α-tertiary and -quaternary 2-arylcycloalkanones are rapidly accessed by scandium(III) triflate-catalyzed diazoalkane-carbonyl homologations. Recent developments have allowed for carbon insertion reactions to be performed with catalyst loadings as low as 0.5 mol% on scales up to 5 mmol. Pairing readily available bis- and tris(oxazoline) based ligands with scandium triflate allows access to arylated medium ring carbocycles with enantioselectivities up to 98:2 er and >98% yield. The formal C-C insertion of aryldiazomethanes into unsubstituted cycloalkanones provides a single-step solution to the ongoing challenge of α-arylation.
Mg-promoted reduction of a mixture of aromaticketones (or imines) and aliphatic carbonyl compounds in N,N-dimethylformamide (DMF) brought about unique mixed pinacol type of cross coupling to give unsymmetrical vicinal diols (or amino alcohols) or α-hydroxyketones in good to moderate yields. The reaction may be initiated by electron transfer from magnesium metal to an aromatic carbonyl compound possessing a