Oxidations diols

Much more difficult is the interpretation of the behaviour of supported catalysts in the ethane-1,2-diol oxidation. In fact, despite the smaller gold particles, Au/XC72R displayed the worst performance either considering the 2 g preparation or the larger preparations (Table 14). 

A distannation product of 2-butyne-l,4-diol oxidatively cyclizes to provide 3,4-bis(stannyl)furan, which then undergoes palladium-catalyzed cross-coupling with an aryl iodide to give 3,4-diarylfuran (Scheme 31).152,153... 

D. After saponification of D to the corresponding diol, oxidation of the primary hydroxy group with tetra(n-propyl)ammonium perruthenate produced lactone... 

In support of this proposed network sufficient Bronsted and Lewis acidity have been associated with the surface of VPO catalysts (refs. 8-10) Indeed in the presence of water some Lewis acidic sites convert into Bronsted sites. Sufficient water is produced via complete oxidation products to support the reaction network. Finally diol oxidation is a well known reaction in conventional organic chemistry (ref. 11), and from Table 1 butane-2,3-diol, under our conditions, readily formed large amounts of AcH at low temperature. Oxidation of the enol form of MEK i.e.,... 

Two tandem alkene metathesis-oxidation procedures using Grubb s second-generation ruthenium catalyst resulted in unique functional group transformations. Use of sodium periodate and cerium(III) chloride, in acetonitrile-water, furnished cis-diols. Oxidation with Oxone, in the presence of sodium hydrogencarbonate, yielded a-hydroxy ketones.296 Secondary alcohols are oxidized to ketones by a hydrogen... 

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