Metal-Free CH–CH-Type Cross-Coupling of Arenes and Alkynes Directed by a Multifunctional Sulfoxide Group
摘要:
A metal-free CH-CH-type coupling of arenes and alkynes, mediated by a multifunctional sulfoxide directing group, exploits nonprefunctionalized coupling partners, proceeds under mild conditions, is operationally simple, and exhibits high functional group tolerance. The products of the CH-CH coupling are highly versatile, and the metal-free process can be used for the construction and late-stage modification of important molecular scaffolds.
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed cyclization of alkynes: direct synthesis of 3-silyl heterocyclic compounds
作者:Mengxing Li、Ting Wang、Zhenyu An、Rulong Yan
DOI:10.1039/d0cc04314a
日期:——
An efficient one-pot strategy for easy access to 3-silyl heterocyclic compounds was developed via a B(C6F5)3-catalyzed cycloaddition reaction of o-(1-alkynyl)(thio)anisoles or o-(1-alkynyl)-N-methylaniline.
A new synthesis of 2-substituted benzofurans and benzothiophens: Novel fragmentation reactions of simple alkyl groups
作者:R.Alan Aitken、Graham Burns
DOI:10.1016/s0040-4039(00)96366-4
日期:1987.1
Flashvacuumpyrolysis of (2-methoxy- and (2-methylthiobenzoyl)alkylidenetriphenylphosphoranes results in loss of Ph3PO and methyl radical; cyclisation of the resulting radical intermediates leads to benzofurans and benzothiophens in which the 2-substituents have undergone novel fragmentation processes.
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.