report their enantioselectivesynthesis by α-arylation of primary aliphatic and benzylic alcohols under sequential catalysis integrating a Ru-catalyzed hydrogen transfer oxidation and a Ru-catalyzed nucleophilic addition. The method can be applied to various alcohols and aryl nucleophiles tolerating a range of functional groups, including secondary alcohols, ketones, alkenes, esters, NH amides, tertiary
Palladium-Catalyzed Conjunctive Cross-Coupling with Electronically Asymmetric Ligands
作者:Chenpeng Gao、Christopher A. Wilhelmsen、James P. Morken
DOI:10.1021/acs.joc.2c02341
日期:2023.2.3
Palladium-catalyzed conjunctive cross-coupling can be accomplished with the use of chiral phosphine-oxazoline based ligand structures. Of note, the reaction can be conducted on Grignard-based boron ate complexes and operates without the use of halide-scavenging additives, which are required for other catalyst systems.
Asymmetric Catalytic Hydroboration of Enol Carbamates Enables an Enantioselective Matteson Homologation
作者:Joseph M. Ready、Dmitry M. Kuznetsov
DOI:10.1055/a-2106-1461
日期:2023.11
A rhodium-catalyzed asymmetric hydroboration of enol carbamates yields α-boryl carbamates with a good enantioselectivity. The enol carbamate starting materials can be prepared with moderate Z-selectivity by using a modified Juila olefination; they can then be used as the resulting E/Z mixtures, taking advantage of the faster reactivity of the major Z-isomers in the directed hydroboration. Optically