Enantioselective Baeyer–Villiger Oxidation Catalyzed by Palladium(II) Complexes with Chiral <i>P,N</i>-Ligands
作者:Andrei V. Malkov、Frédéric Friscourt、Mark Bell、Martin E. Swarbrick、Pavel Kočovský
DOI:10.1021/jo800246g
日期:2008.6.1
Asymmetric Baeyer–Villiger reaction of symmetrical cyclobutanones 1a−j with urea−hydrogen peroxide (UHP) can be catalyzed by a complex of Pd(II) and the new terpene-derived P,N-ligand 7. The resulting lactones 2a−j were obtained in high yields and with good enantioselectivity (≤81% ee).
Intermolecular Enantioselective Heck–Matsuda Arylations of Acyclic Olefins: Application to the Synthesis of β-Aryl-γ-lactones and β-Aryl Aldehydes
作者:Caio C. Oliveira、Ricardo A. Angnes、Carlos Roque D. Correia
DOI:10.1021/jo400378g
日期:2013.5.3
intermolecular Heck–Matsuda arylation of acyclic allylicalcohols. Aryldiazonium tetrafluoroborates were applied as arylating agents in the presence of Pd(TFA)2 and a chiral, commercially available, bisoxazoline ligand. The methodology is straightforward, robust, scalable up to a few grams, and of broad scope allowing the synthesis of a range of β-aryl-carbonyl compounds in good to high enantioselectivities
Charge-Transfer Effect on Chiral Phosphoric Acid Catalyzed Asymmetric Baeyer-Villiger Oxidation of 3-Substituted Cyclobutanones Using 30% Aqueous H2O2 as the Oxidant
作者:Senmiao Xu、Zheng Wang、Xumu Zhang、Kuiling Ding
DOI:10.1002/cjoc.201090292
日期:2010.9
intermolecular charge‐transfer effect has been employed for the first time as a modulating approach to affect the enantioselectivity in asymmetric catalysis by taking the chiral phosphoric acidcatalyzedasymmetric Baeyer‐Villiger oxidation of 3‐aryl cyclobutanones as the reaction prototype. It was found that the electron acceptor additives were able to effectively tune the enantioselectivity via donor‐acceptor
for enantioselective Baeyer–Villiger (B–V) oxidation of prochiral cyclobutanones. Among the prepared catalysts, the supported ones showed better enantioselectivity, good thermal stability and negligible loss of activity over consecutive recycling offset by lower chemical yield. We report here an efficient method for asymmetricBaeyer–Villigeroxidation of prochiral cyclobutanones using new polymer-supported
In Tandem Auto‐Sustainable Enantioselective Heck‐Matsuda Reactions Directly from Anilines
作者:Christian Leonardo Herrera、João Victor Santiago、Julio Cezar Pastre、Carlos Roque Duarte Correia
DOI:10.1002/adsc.202200205
日期:2022.6.7
An in tandem enantioselective Heck-Matsuda (HM) reaction of cyclic and acyclic olefins directly from anilines is described. The method relies on a process involving the progressive in situ diazotization of the starting anilines followed by a palladium-catalyzed Heck-Matsuda arylation using chiral N,N-ligands. This intermolecular enantioselective HM arylation strategy was applied to the desymmetrization