摘要: Mixtures of alcohols and ketones are selectively and actively produced by catalytically oxidizing at least one alkane with an organic hydroperoxide, in the presence of a catalytically effective amount of osmium or an osmium compound, notably osmium tetroxide....
to partially protected azido sugar as a starting material, the Staudinger The reaction of the azide group converted to aza-Wittig reagent, and then open sugar ring, freed of aldehyde with aza Wittig reagent generating imide ring, and then with thioglycolic acid to form a ring to give bicyclic...
The yield of γ-hydroxyketone was indeed increased relative to 2a case; however, it was still lower (appr. 20%) when the reaction conditions were the same as the selective oxidation of cyclopropane (Table S1). Then, we added 0.1% (v/v) triethylamine as proton transfer reagent to the ...
The small difference between the acidity of the hydroperoxy groups of this alkanediol-derived molecule prevents high selectivity upon reaction with electrophiles. Using ketone peroxides of formula HOO—C(R1)(R2)—OOH, multi-half-life peroxides (i.e. peroxides with different reactivities in the ...
An interesting route to boron enolates provides a regioselective one-pot route to unsymmetrical α-bromoketones from readily available alkenyl boronates<1995TL5665>. Hydrozirconation of alkenyl boronates followed by treatment of the resultinggem-borazirconocene alkane with acid chlorides leads to the for...
755. In such processes, reactants such as (a) an aromatic monocarboxylic acid; (b) a mixture of at least one aromatic dicarboxylic acid, and an aromatic compound, and (c) combinations of (a) and (b) are reacted in the presence of a fluoroalkane sulphonic acid, particularly trifluoro...
Preferably it is a substantially non-sulphonating reagent towards the aromatic ether ketone polymer. For example, where the aromatic ether ketone polymer is polyetheretherketone (or another aromatic ether ketone polymer having O-Ph-O— or other electron-rich readily sulphonatable units) the strong ...
To produce a ketone from a secondary alcohol corresponding thereto with high yield and selectivity by using a small amount of a bromic acid or a salt thereof.;SOLUTION: The ketone is produced by oxidizing the corresponding secondary alcohol in the presence of an oxidizing reagent composed of the...
The resulting metal salt is converted to an amino Schiff base which may be used as a starting material for preparing an &agr;,&ohgr;-diamino alkane which may or may not include an amino group as a side chain. This further produces a metallic carbonate compound. The metallic carbonate is ...