Hydroformylation Of Vinyl Acetate Research Articles

Hydroformylation of vinyl acetate using homogeneous HRh(CO)(PPh 3) 3 catalyst: a kinetic study

The kinetics of hydroformylation of vinyl acetate using HRh(CO)(PPh 3) 3 catalyst has been investigated in the temperature range 50 – 70 °C. The effect of partial pressures of H 2 and CO, concentrations of vinyl acetate and HRh(CO)(PPh 3) 3 on the rate of hydroformylation was studied. It was observed that certain minima of concentration of HRh(CO)(PPh 3) 3 and H 2 partial pressure are necessary for the reaction to proceed. Beyond such critical concentrations, the rate was found to be first order with H 2 and catalyst. With increasing CO and vinyl acetate concentrations, the rates passed through maxima, indicating substrate inhibition at higher concentrations. The observed kinetics has been discussed on the basis of a reaction mechanism. Finally, several rate equations were examined to arrive at a satisfactory one. The activation energy was found to be 17.86 kcal mol −1.

Asymmetric hydroformylation of vinyl acetate with DIOP-type ligands

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAsymmetric hydroformylation of vinyl acetate with DIOP-type ligandsCharles F. Hobbs and W. S. KnowlesCite this: J. Org. Chem. 1981, 46, 22, 4422–4427Publication Date (Print):October 1, 1981Publication History Published online1 May 2002Published inissue 1 October 1981https://doi.org/10.1021/jo00335a020RIGHTS & PERMISSIONSArticle Views820Altmetric-Citations72LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (757 KB) Get e-Alerts Get e-Alerts

The Asymmetric Hydroformylation of Vinyl Acetate

Abstract Vinyl acetate gives selectively (S)-2-acetoxypropanal in 10–24% optical yields by the asymmetric hydroformylation with μ,μ′-dichlorotetracarbonyldirhodium–(−)-DIOP. (R)-Benzylmethylphenylphosphine and neomenthyldiphenylphosphine give low optical yields. The reaction depends essentially on the DIOP/rhodium ratio. Just 2 mol or more of (−)-DIOP per g-atm of rhodium is required for the asymmetric reaction. Other reaction variables (temperatures and pressures of hydrogen and carbon monoxide) have minor effects.