Suzuki−Miyaura Cross-Coupling Reactions of Potassium Vinyltrifluoroborate with Aryl and Heteroaryl Electrophiles
摘要:
We have previously reported that the palladium-catalyzed cross-coupling reaction of potassium vinyltrifluoroborate with aryl electrophiles proceeds with good yields. Herein, we describe recent progress in optimizing the reaction, as well as outlining the scope and limitations of the reaction. The cross-coupling reaction can generally be effected using 2 mol % of PdCl2 and 6 mol % of PPh3 as a catalyst system in THF/H2O with Cs2CO3 as a base. Moderate to good yields are obtained in the presence of a variety of functional groups.
Copper-Catalyzed Intermolecular Difunctionalization of Styrenes with Thiosulfonates and Arylboronic Acids via a Radical Relay Pathway
作者:Qingjin Liang、Patrick J. Walsh、Tiezheng Jia
DOI:10.1021/acscatal.9b04887
日期:2020.2.21
intermolecular difunctionalization strategy of styrenes with methyl thiosulfonates and arylboronic acids has been developed. This method provides an efficient and straightforward avenue to a broad range of 2,2-diarylethyl sulfone derivatives from readily available methyl thiosulfonates and commercially available styrene and arylboronic acid derivatives. The diverse substrate scope attests to the high
The present disclosure provides methods to make liquid fuels from renewable, carbon neutral precursors. Specifically, methods to prepare 2,5-dimethylfuran from a source of fructose or other carbohydrates using a one-pot synthesis are provided. In some embodiments, the disclosed methods avoid the isolation of intermediates, and employ “green” reagents like formic acid and acetic acid.
secondary amine and underwent asymmetric [3 + 2] cycloaddition reactions with N-trifluoroethyl-substituted isatin imines, furnishing a variety of spirooxindoles incorporating a 3,2′-pyrrolidine motif with excellent stereoselectivity. In addition, this strategy has been successfully expanded to a number of vinyl-substituted electron-rich heteroaryl aldehydes and even some specific aryl aldehydes.
Divergent Hydroxysulfenylation and Chlorosulfonylation of Styrenes with Sulfinyl Chlorides Steered by Controlled Disproportionation of Sulfoxide‐Onium Ions
作者:Qingjin Liang、Tiezheng Jia
DOI:10.1002/adsc.202300320
日期:2023.6.13
Herein, sulfinylchlorides and styrenes have been exploited to afford either β-hydroxy-phenylethyl sulfides catalyzed by homogenous ZnCl2, or β-chloro-phenylethyl sulfones mediated by heterogeneous CuO nanoparticles (NPs). The key to achieve such a divergent synthetic strategy is the controlled disproportionation process of sulfoxide-onium ions, induced by different metal complexes. Owing to the mild