作者:Adam J. Ruddy、Orson L. Sydora、Brooke L. Small、Mark Stradiotto、Laura Turculet
DOI:10.1002/chem.201403945
日期:2014.10.20
Herein we establish the utility of a three‐coordinate (N‐phosphinoamidinate)cobalt(amido) pre‐catalyst that is capable of effecting challenging alkene isomerization/hydroboration processes at room temperature, leading to the selective terminal addition of the boron group.
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
iron: A new PNN iron complex has been developed for use in an iron‐catalyzed alkenehydroboration reaction under mild conditions. The environmentally friendly and earth‐abundant iron catalyst system is superior to precious‐metal systems in terms of efficiency and selectivity for α‐olefin hydroborations with pinacolborane.
Manganese-Catalyzed Hydroboration of Terminal Olefins and Metal-Dependent Selectivity in Internal Olefin Isomerization–Hydroboration
作者:Subhash Garhwal、Asja A. Kroeger、Ranjeesh Thenarukandiyil、Natalia Fridman、Amir Karton、Graham de Ruiter
DOI:10.1021/acs.inorgchem.0c03451
日期:2021.1.4
In the past decade, the use of earth-abundant metals in homogeneous catalysis has flourished. In particular, metals such as cobalt and iron have been used extensively in reductive transformations including hydrogenation, hydroboration, and hydrosilylation. Manganese, on the other hand, has been considerably less explored in these reductive transformations. Here, we report a well-defined manganese complex
Tropylium-Promoted Hydroboration Reactions: Mechanistic Insights <i>Via</i> Experimental and Computational Studies
作者:Nhan N. H. Ton、Binh Khanh Mai、Thanh Vinh Nguyen
DOI:10.1021/acs.joc.1c01208
日期:2021.7.2
hydroboration reaction of alkynes. A broad range of vinylboranes can be easily accessed via this metal-free protocol. Similar hydroboration reactions of alkenes and epoxides can also be efficiently catalyzed by the same tropylium catalysts. Experimentalstudies and DFT calculations suggested that the reaction follows an uncommon mechanistic pathway, which is triggered by the hydride abstraction of pinacolborane