Ni-Catalyzed 1,2-Diarylation of Alkenyl Ketones: A Comparative Study of Carbonyl-Directed Reaction Systems
作者:Roman Kleinmans、Omar Apolinar、Joseph Derosa、Malkanthi K. Karunananda、Zi-Qi Li、Van T. Tran、Steven R. Wisniewski、Keary M. Engle
DOI:10.1021/acs.orglett.1c01447
日期:2021.7.16
2-diarylation of alkenyl ketones with aryl iodides and arylboronic esters is reported. Ketones with a variety of substituents serve as effective directing groups, offering high levels of regiocontrol. A representative product is diversified into a wide range of useful products that are not readily accessible via existing 1,2-diarylation reactions. Preliminary mechanistic studies shed light on the binding
Palladium-catalysed arylation of tert-cyclobutanols with arylbromide involving enantioselective C-Cbondcleavage affords chiral ketones with moderate to good enantioselectivity.
A novel enantioselective C-C bondcleavage has been achieved using palladium catalysts and chiral N,P-bidentate ligands in the asymmetric arylation, vinylation, and allenylation of tert-cyclobutanols. In these reactions, the enantioselective beta-carbon elimination of Pd(II) alcoholate formed in situ is the key step. Treatment of tert-cyclobutanols with arylating reagents in toluene in the presence
n-BuLi-promoted [1,4]-Wittig rearrangement of allylic ethers was developed successfully in this work, in which the Wittig rearrangement reaction provided a facileapproach to the synthesis of aromatic β-benzyl ketones under mild reaction conditions.