Cobalt-Catalyzed Hydroboration of Terminal and Internal Alkynes
作者:María J. González、Felix Bauer、Bernhard Breit
DOI:10.1021/acs.orglett.1c02854
日期:2021.11.5
A novel methodology to access synthetically versatile vinylboronic esters through a ligand-controlled cobalt-catalyzed hydroboration of terminal and internalalkynes is reported. The approach relies on the in situ reduction of Co(II) by H-BPin in the presence of bisphosphine ligands generating catalytically active Co(I) hydride complexes. This procedure avoids the use of stoichiometric amounts of base
Bis(imidazoline-2-thione)–copper(i) catalyzed regioselective boron addition to internal alkynes
作者:Hye Ryung Kim、Il Gu Jung、Kihyun Yoo、Kwonho Jang、Eun Sun Lee、Jaesook Yun、Seung Uk Son
DOI:10.1039/b919515g
日期:——
New catalytic systems based on a bis(1,3-disubstituted imidazoline 2-thione)âcopper complex have been developed for the highly regioselective boration of internal alkynes.
A<i>trans</i>-Selective Hydroboration of Internal Alkynes
作者:Basker Sundararaju、Alois Fürstner
DOI:10.1002/anie.201307584
日期:2013.12.23
the rule: The reigning stereochemical principle of hydroboration is the suprafacial delivery of hydrogen and boron to the same π‐face of a given starting material. This fundamental rule of cis addition is now easily broken for internalalkynes with the help of [Cp*Ru(MeCN)3]PF6 (Cp*=η5‐C5Me5) as the catalyst. The resulting trans‐selective hydroboration opens a practical new entry into E‐configured alkenylboron
Process for the trans-selective hydroboration of internal alkynes
申请人:Studiengesellschaft Kohle mbH
公开号:EP2857405A1
公开(公告)日:2015-04-08
The present invention refers to a process for the trans-selective hydroboration of internal alkynes and the so-obtained products. The inventive process makes use of a borane of the formula X1X2BH selected from the group of dialkyl boranes or di(alkoxy)boranes which are reacted with the internal alkynes in the presence of a cyclyopentadienyl-coordinated ruthenium catalyst.
[EN] PROCESS FOR THE TRANS-SELECTIVE HYDROBORATION OF INTERNAL ALKYNES<br/>[FR] PROCÉDÉ D'HYDROBORATION TRANS-SELECTIVE D'ALKYNES INTERNES
申请人:STUDIENGESELLSCHAFT KOHLE MBH
公开号:WO2015049257A1
公开(公告)日:2015-04-09
The present invention refers to a process for the trans-selective hydroboration of internal alkynes and the so-obtained products. The inventive process makes use of a borane of the formula X1X2BH selected from the group of dialkyl boranes or di(alkoxy)boranes which are reacted with the internal alkynes in the presence of a cyclyopentadienyl-coordinated ruthenium catalyst.