Iron Phosphate Catalyzed Asymmetric Cross-Dehydrogenative Coupling of 2-Naphthols with β-Ketoesters
作者:Sachin Narute、Doron Pappo
DOI:10.1021/acs.orglett.7b01152
日期:2017.6.2
Chiral iron phosphate complexes were successfully exploited for asymmetric cross-dehydrogenative coupling reactions between 2-naphthols and beta-ketoester derivatives. On the basis of kinetic studies, it is suggested that iron monophosphate complexes constitute the active catalysts that induce stereoselectivity during the carboncarbon bond-formation step.
Bifunctional Guanidine via an Amino Amide Skeleton for Asymmetric Michael Reactions of β-Ketoesters with Nitroolefins: A Concise Synthesis of Bicyclic β-Amino Acids
Two activations are better than one: The chiralbifunctional guanidine 1, which features an amino amide backbone, catalyzes the asymmetric Michael addition of a range of substrates and gives products with excellent stereoselectivities. The method also allows the efficient synthesis of optically pure β‐amino acidesters. Both the guanidine group and the NH proton of the amide were important for the
A Facile and Selective Procedure for Transesterification of β-Keto Esters Promoted by Yttria-Zirconia Based Lewis Acid Catalyst
作者:Pradeep Kumar、Rajesh Kumar Pandey
DOI:10.1055/s-2000-6496
日期:2000.2
An yttria-zirconia based strong Lewis acid efficiently catalyses the transesterification of β-keto esters under environmentally safe, heterogeneous reaction conditions with high selectivity and in good to excellent yields.