NiH‐Catalyzed Remote Asymmetric Hydroalkylation of Alkenes with Racemic α‐Bromo Amides
作者:Fang Zhou、Yao Zhang、Xianfeng Xu、Shaolin Zhu
DOI:10.1002/anie.201813222
日期:2019.2.4
Reported here is a terminal‐selective, remote asymmetric hydroalkylation of olefins with racemic α‐bromo amides. The reaction proceeds by NiH‐catalyzed alkene isomerization and subsequent alkylation reaction, and can enantioconvergently introduce an unsymmetrical secondary alkyl group from a racemic α‐bromo amide onto a terminalC(sp3)−H position along the hydrocarbon chain of the alkene. This mild process
An iridium-catalyzed remote site-switchable hydroarylation of alkenes controlled by two different ligands was reported. The protocol enables access to the products functionalized at the subterminal methylene and terminal methyl positions on an alkyl chain in good results. The results of the control experiments and DFT calculations demonstrate that the reaction involves a chain-walking process and the
NiH-Catalyzed Reductive Relay Hydroalkylation: A Strategy for the Remote C(sp<sup>3</sup>
)−H Alkylation of Alkenes
作者:Fang Zhou、Jin Zhu、Yao Zhang、Shaolin Zhu
DOI:10.1002/anie.201712731
日期:2018.4.3
The terminal‐selective, remoteC(sp3)−H alkylation of alkenes was achieved by a relay process combining NiH‐catalyzed hydrometalation, chain walking, and alkylation. This method enables the construction of unfunctionalized C(sp3)−C(sp3) bonds under mild conditions from two simple feedstock chemicals, namely olefins and alkyl halides. The practical value of this transformation is further demonstrated