Mild Cu-Catalyzed Oxidation of Benzylic Boronic Esters to Ketones
作者:James D. Grayson、Benjamin M. Partridge
DOI:10.1021/acscatal.9b00992
日期:2019.5.3
The oxidation of benzylic boronic esters directly to the ketone is reported. This mild Cu-catalyzed method uses an ambient atmosphere of air as the terminal oxidant and is notably chemoselective. Oxidation of the C–B bond occurs selectively, even in the presence of unprotected alcohols. Initial investigation suggests the reaction proceeds through an alkylboron to Cu transmetalation, peroxide formation
We report on the effect of small side-chain modifications to the structure of 3,3-dimethyl-1-(trifluoromethyl)-3H-1λ3,2-benziodaoxole (1b) on its reactivity, as expressed by the initial rate v0 in a model reaction, and show how the latter can be successfully correlated to an easily determined physical parameter p, a 13C NMR chemical shift. The relationship v0 ~ p is already present in the simplest
Kinetic Resolution of Hydroperoxides with Enantiopure Phosphines: Preparation of Enantioenriched Tertiary Hydroperoxides
作者:Tom G. Driver、Jason R. Harris、K. A. Woerpel
DOI:10.1021/ja070482f
日期:2007.4.1
kinetic resolution strategy capable of accessing opticallyactivetertiary hydroperoxides is reported. Readily accessible tertiary hydroperoxides are resolved with commercially available (R)- or (S)-xylyl-PHANEPHOS with selectivity factors as large as 37. The resulting bis(phosphineoxide) can be recycled in high yields. The isolated mono(phosphineoxide) intermediate resolved hydroperoxides with the
Reduction of benzylic alcohols and α-hydroxycarbonyl compounds by hydriodic acid in a biphasic reaction medium
作者:Michael Dobmeier、Josef M Herrmann、Dieter Lenoir、Burkhard König
DOI:10.3762/bjoc.8.36
日期:——
was improved to be more applicable to organic synthesis. Instead of a strongly acidic, aqueous solution, a biphasic toluene-water reaction medium was used, which allowed the conversion of primary, secondary and tertiary benzylic alcohols, in good yields and short reaction times, into the corresponding hydrocarbons. Red phosphorous was used as the stoichiometric reducing agent. Keto, ester, amide or
BENZOIMIDAZOL-1,2-YL AMIDES AS Kv7 CHANNEL ACTIVATORS
申请人:Knopp Biosciences LLC
公开号:US20160075663A1
公开(公告)日:2016-03-17
Optionally substituted benzoimidazol-1,2-yl amides, such as compounds of Formula 1 or Formula 2, can be used to treat disorders associated with a Kv7 potassium channel activator. Compositions, medicaments, and dosage forms related to the treatment are also disclosed herein.