A practical and environmental‐friendly method was developed to convert vinylether into acetate by using a palladium complex with phosphine ligand and hydrogen peroxide. The only by‐product is water.
<i>N</i>,<i>N</i>-Dimethylformamide-stabilised palladium nanoparticles combined with bathophenanthroline as catalyst for transfer vinylation of alcohols from vinyl ether
We report N,N-dimethylformamide-stabilised Pd nanoparticle (Pd NP)-catalysed transfervinylation of alcohols fromvinyl ether. Pd NPs combined with bathophenanthroline exhibited high catalytic activity. This reaction proceeded with low catalyst loading and the catalyst remained effective even after many rounds of recycling. The observation of the catalyst using transmission electron microscopy and
A process for producing a high-purity vinyl ether, which comprises:
a step of subjecting an alcohol represented by the general formula (1)
R—O—H (1)
to a vinyl ether formation reaction in the presence of a catalyst to synthesize a vinyl ether represented by the general formula (2),
R—O—CH═CH
2
(2)
a step of removing the catalyst from the reaction mixture obtained in the above step to obtain a crude vinyl ether containing the vinyl ether and the unreacted raw material alcohol,
a step of reacting the unreacted raw material alcohol in the crude vinyl ether, with the vinyl ether in the presence of an acid catalyst, to convert the alcohol into an acetal represented by the general formula (3),
and
a step of subjecting a crude vinyl ether containing the acetal (III) to distillation to obtain a high-purity vinyl ether.
A Facile One-Pot Synthesis of Symmetrical and Unsymmetrical Acetaldehyde Acetals from Primary Alcohols
作者:Rodney Kiplin Guy、Richard Anthony DiPietro
DOI:10.1080/00397919208019270
日期:1992.3
alcohol 1 with ethyl vinyl ether in the presence of mercury (11) acetate followed by treatment with the same or a different alcohol in the presence of p-toluenesulfonic acid affords the symmetrical and unsymmetrical acetaldehyde acetals 3 in good overall yield. The method is easily scaled up and represents a significant improvement over currently available procedures.