Ni-Catalyzed cross-coupling of aryl thioethers with alkyl Grignard reagents <i>via</i> C–S bond cleavage
作者:Dan Zhu、Lei Shi
DOI:10.1039/c8cc03665a
日期:——
A Ni-catalyzed cross-coupling of aryl thioethers with alkyl Grignardreagents, accompanied by the cleavage of the C(aryl)–SMe bond, has been presented. This method is distinguished by its mild conditions and moderate functional group tolerance, such as hydroxyl, halogen, and heterocycles, which should provide a straightforward access to the modification of sulfur-containing molecules.
Migratory Hydrogenation of Terminal Alkynes by Base/Cobalt Relay Catalysis
作者:Xufang Liu、Bingxue Liu、Qiang Liu
DOI:10.1002/anie.201916014
日期:2020.4.20
an analogous protocol for alkyne substrates is yet to be developed. Herein, a base and cobalt relay catalytic process for the selective synthesis of (Z)-2-alkenes and conjugated E alkenes by migratory hydrogenation of terminalalkynes is disclosed. Mechanistic studies support a relay catalytic process involving a sequential base-catalyzed isomerization of terminalalkynes and cobalt-catalyzed hydrogenation
Synergistic Hydrocobaltation and Borylcobaltation Enable Regioselective Migratory Triborylation of Unactivated Alkenes
作者:Yinsong Zhao、Shaozhong Ge
DOI:10.1002/anie.202116133
日期:2022.3.28
A regioselective cobalt-catalyzed triborylation of unactivatedalkenes is developed to access synthetically versatile 1,1,3-triborylalkanes with a catalyst generated from Co(acac)2 and xantphos. Mechanistic studies reveal that this triborylation reaction proceeds through three interdependent catalytic cycles.