Recyclable Copper Nanoparticles‐Catalyzed Hydroboration of Alkenes and β‐Borylation of α,β‐Unsaturated Carbonyl Compounds with Bis(Pinacolato)Diboron
作者:Mahadev L. Shegavi、Suresh Saini、Ramesh Bhawar、Meghana Desai Vishwantha、Shubhankar Kumar Bose
DOI:10.1002/adsc.202001616
日期:2021.4.27
Nano‐ferrite‐supported Cu nanoparticles (Fe‐dopamine‐Cu NPs) catalyzed anti‐Markovnikov‐selective hydroboration of alkenes with B2pin2 is reported undermild reaction conditions. This protocol can be applied to a broad range of substrates with high functional group compatibility. In addition, we demonstrated the use of Fe‐dopamine‐Cu NPs as a catalyst for the β‐borylation of α,β‐unsaturatedketones and ester, providing
Markovnikov-Selective Co(I)-Catalyzed Hydroboration of Vinylarenes and Carbonyl Compounds
作者:Piyush Kumar Verma、Sethulekshmi A. S.、K. Geetharani
DOI:10.1021/acs.orglett.8b03356
日期:2018.12.21
An NHC-supported Co(I) catalyst has been developed for selective Markovnikovhydroboration of vinylarenes under mild reaction conditions. The hydroboration allows highly selective synthesis of a wide range of secondary and tertiary alkyl boronates in excellent yields. Our protocol also enables hydroboration of aldehydes and ketones with diverse functional groups to access the corresponding borate esters
A Cobalt-Catalyzed Alkene Hydroboration with Pinacolborane
作者:Lei Zhang、Ziqing Zuo、Xuebing Leng、Zheng Huang
DOI:10.1002/anie.201310096
日期:2014.3.3
efficient cobalt catalyst for the hydroboration of both vinylarenes and aliphatic α‐olefins with pinacolborane is described, providing the anti‐Markovnikov products with excellent regio‐ and chemoselectivity, broad functional‐group tolerance, and high turnover numbers (up to 19 800). The alkenehydroboration route is further extended to a two‐step, one‐pot hydroboration and cross‐coupling of alkylboronates
Insights into a Chemoselective Cobalt Catalyst for the Hydroboration of Alkenes and Nitriles
作者:Abdulrahman D. Ibrahim、Steven W. Entsminger、Alison R. Fout
DOI:10.1021/acscatal.7b00362
日期:2017.5.5
A chemoselective hydroboration protocol with terminal alkene substrates is reported using an electron-rich, low-valent cobalt pincer compound. The process is catalytic and leads to exclusive formation of anti-Markovnikov products, tolerating amino groups, esters, epoxides, ketones, and other functionalities. The protocol was successfully extended toward the hydroboration of nitriles, generating the
Hydroboration of Terminal Alkenes and
<i>trans</i>
‐1,2‐Diboration of Terminal Alkynes Catalyzed by a Manganese(I) Alkyl Complex
作者:Stefan Weber、Daniel Zobernig、Berthold Stöger、Luis F. Veiros、Karl Kirchner
DOI:10.1002/anie.202110736
日期:2021.11.8
A MnI-catalyzed hydroboration of terminal alkenes and the 1,2-diboration of terminal alkynes with pinacolborane is described. In the case of alkenes anti-Markovnikov hydroboration takes place, while in the case of alkynes the reaction proceeds with trans-1,2-selectivity.