Synthesis of γ-Sulfur-Substituted Ketones via Rh(II)/Sc(III) a Cocatalyzed Three-Component Reaction of Diazo Compounds with Thiophenols and Enones
作者:Guolan Xiao、Chaoqun Ma、Xiang Wu、Dong Xing、Wenhao Hu
DOI:10.1021/acs.joc.7b03074
日期:2018.4.20
A facile method for the synthesis of γ-sulfur-substituted ketones is developed via a Rh(II)/Sc(III) cocatalyzed three-componentreaction of diazo compounds with thiophenols and enones. With this method, different γ-sulfur-substituted ketones were obtained in moderate to high yields with good diastereoselectivities.
Tandem Remote Csp<sup>3</sup>–H Activation/Csp<sup>3</sup>–Csp<sup>3</sup> Cleavage in Unstrained Aliphatic Chains Assisted by Palladium(II)
作者:Marta Pérez-Gómez、Hamid Azizollahi、Ivan Franzoni、Egor M. Larin、Mark Lautens、José-Antonio García-López
DOI:10.1021/acs.organomet.8b00920
日期:2019.2.25
We report here a proof-of-concept for the cleavage of unstrained remote Csp3–Csp3 bonds at roomtemperature assisted by a directing group, opening up new possibilities to use aliphatic carboxylicacids as suitable alkenyl coupling partners. This strategy involves the Pd-mediated Csp3–H activationdirected by a tethered 8-aminoquinoline group, followed by a concerted asynchronous carbene insertion into
Catalytic asymmetric synthesis of 2,5-dihydrofurans using synergistic bifunctional Ag catalysis
作者:Taoda Shi、Shenghan Teng、Alavala Gopi Krishna Reddy、Xin Guo、Yueteng Zhang、Kohlson T. Moore、Thomas Buckley、Damian J. Mason、Wei Wang、Eli Chapman、Wenhao Hu
DOI:10.1039/c9ob01903k
日期:——
report a bifunctional Ag catalyst promotedintramolecular capture of oxonium ylides with alkynes for the enantioselectivesynthesis of 2,5-dihydrofurans. This represents unprecedented synergistic catalysis of a bifunctional Ag catalyst. Mechanistic studies revealed that [(R)-3,5-DM-BINAP](AgSbF6)2 (9) is likely to be the active catalytic species and that the reaction involves second order kinetics with
Pd(<scp>ii</scp>)-catalyzed formal [4+1] cycloaddition reactions of diazoacetates and aryl propargyl alcohols to form 2,5-dihydrofurans
作者:Taoda Shi、Xin Guo、Shenghan Teng、Wenhao Hu
DOI:10.1039/c5cc05000f
日期:——
Pd(ii)-catalyzed auto-tandem formal [4+1] cycloaddition of diazoacetates and aryl propargyl alcohols affords 2,5-dihydrofurans as the dominant product over traditional ones.