40552-84-9Relevant articles and documents
Ag-Cu nanoparticles as efficient catalysts for transesterification of β-keto esters under acid/base-free conditions
Yue, Hongmei,Yu, Hao,Liu, Sheng,Xu, Chunli
, p. 19041 - 19051 (2016/03/01)
Transesterification of β-keto esters and alcohols are traditionally catalyzed by acid or basic catalysts. However, these traditional catalysts do not always meet the requirements of modern synthetic chemistry which need to be highly efficient, selective, and environmentally friendly. In this work, Ag-Cu metal sites were first introduced as transesterification catalysts. The effect of the support, Ag:Cu molar ratio, and reaction conditions were investigated. The Ag-Cu metal sites were proved to be active in the β-ketoester transesterification with various alcohols, having yields comparable to the conventional acid- or base-catalysts.
Process for the transesterification of keto esters using solid acids as catalysts
-
, (2008/06/13)
A process for the transesterification of keto esters and alcohols in approximately stoichiometric amounts using a solid acid catalyst. Solid acid catalysts may be sulfated zirconia, sulfated tin oxide, sulfated titania, sulfated iron oxide, heteropoly acids, acidic clays, acidic zeolites, or any other solid acids with high acidity or super acidity, with or without dopants. One equivalent or more of keto ester, one equivalent or more of alcohol, the solid acid catalyst, and an appropriate solvent are mixed and heated to 70 to 120° C. at atmospheric or reduced pressure to furnish the keto transester in high yields.
Diketene a new esterification reagent in the enzyme-aided synthesis of chiral alcohols and chiral acetoacetic acid esters
Jeromin, Guenter E.
, p. 6663 - 6664 (2007/10/02)
It was found that in the presence of Pseudomonas lipase diketene can be used as a new reagent for irreversible and enantioselective acylation of secondary alcohols. The reagent is useful to prepare optically active alcohols and optically active acetoacetic acid esters.
