Highly Diastereoselective Synthesis of Cyclopentenones via a One-Pot Gold Catalysis, Nazarov Cyclization and Alkylation Cascade
作者:Long-Wu Ye、Meng-Qi Liu、Ai-Hua Zhou、Shuang Jiang、Jia-Qi Wang
DOI:10.1055/s-0033-1341204
日期:——
transformations [gold-catalyzed tandem reaction, scandium(III) trifluoromethanesulfonate catalyzed Nazarov cyclization, alkylation reaction] in a one-pot process led to the formation of cyclopentenonederivatives in excellent diastereoselectivities and moderate to good overall yields. Starting from readily available propargylic carboxylates, three sequential transformations [gold-catalyzed tandem reaction
Rhodium-Catalyzed Addition of Arylzinc Reagents to Aryl Alkynyl Ketones: Synthesis of β,β-Disubstituted Indanones
作者:Ryo Shintani、Tamio Hayashi
DOI:10.1021/ol0506819
日期:2005.5.1
A rhodium-catalyzed addition of arylzinc reagents to aryl alkynyl ketones for the synthesis of highly substituted indanones has been developed. The key to success has proved to be a proper choice of the reaction system, which involves the employment of dppf as a ligand and 1,2-dichloroethane as a solvent.
Redox-Neutral Arylations of Vinyl Cation Intermediates
作者:Daniel Kaiser、Luis F. Veiros、Nuno Maulide
DOI:10.1002/adsc.201600860
日期:2017.1.4
present a new unified concept for C−C bond formation under redox‐neutral conditions. Our strategy hinges upon interception of a vinyl cation with a sulfoxide resulting in simultaneous C–C and C−O bond formation and arylation. A range of structurally diverse vinyl cations are generated in situ in the presence of a sulfoxide, resulting in hydrative arylation, direct arylation of enol triflates and interrupted
Rhodium-Catalyzed [4 + 1] Cyclization via C–H Activation for the Synthesis of Divergent Heterocycles Bearing a Quaternary Carbon
作者:Xiaowei Wu、Haitao Ji
DOI:10.1021/acs.joc.8b00397
日期:2018.4.20
development of an efficient approach to construct fused polycyclic systems bearing a quaternarycarbon center represents a great challenge to synthetic chemistry. Herein, we report a Rh(III)-catalyzed [4 + 1] annulation of propargyl alcohols with various heterocyclic scaffolds under an air atmosphere. Diverse fused heterocycles containing a quaternarycarbon center were obtained in moderate to good
Ruthenium-Catalyzed Redox-Neutral [4 + 1] Annulation of Benzamides and Propargyl Alcohols via C–H Bond Activation
作者:Xiaowei Wu、Bao Wang、Shengbin Zhou、Yu Zhou、Hong Liu
DOI:10.1021/acscatal.7b00031
日期:2017.4.7
transition-metal-catalyzed cycloaddition reactions, in which they generally serve as two-carbon reaction partners. Herein, we report ruthenium(II)-catalyzed redox-neutral [4 + 1] annulation of benzamides and propargyl alcohols, in which propargyl alcohols act as one-carbon units. This synthetic utility of propargyl alcohols led to a series of potentially bioactive N-substituted quaternary isoindolinones