作者:Birte Haberlag、Matthias Freytag、Constantin G. Daniliuc、Peter G. Jones、Matthias Tamm
DOI:10.1002/anie.201207772
日期:2012.12.21
Now even terminal: The 2,4,6‐trimethylbenzylidyne complexes [MesCMOC(CF3)2Me}3] (M=Mo, W) were synthesized from [Mo(CO)6] and [W(CO)6], respectively. The molybdenum complex is an efficient catalyst for the metathesis of internal and terminalalkynes and also for the ring‐closing metathesis of internal and terminal α,ω‐diynes at room temperature and low catalyst concentrations.
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.
Preparation of Imidazolin-2-iminato Molybdenum and Tungsten Benzylidyne Complexes: A New Pathway to Highly Active Alkyne Metathesis Catalysts
作者:Birte Haberlag、Xian Wu、Kai Brandhorst、Jörg Grunenberg、Constantin G. Daniliuc、Peter G. Jones、Matthias Tamm
DOI:10.1002/chem.201000597
日期:2010.8.2
excess of 3‐hexyne. Complexes 3 a and 3 b are able to efficiently catalyse alkyne cross metathesis of various 3‐pentynyl benzyl ethers5 and benzoic esters 7 at room temperature, to afford 2‐butyne and the corresponding diethers 6 and diesters 8. The tungsten complex 3 a proved to be a superior catalyst for ring‐closing alkyne metathesis, and the [10]cyclophanes 10 and 12 were synthesised in high yield
的反应〔PhCMBr 3(DME)](DME = 1,2-二甲氧基乙烷)与六氟叔丁醇盐的LiX或KX [X = OC(CF 3)2本人]得到benzylidyne配合物[PhCMX 3(dme)](2 a:M = W,2 b:M = Mo),它进一步与锂试剂Li(Im t Bu N)反应,该试剂由MeLi由1,3-二叔丁基咪唑啉-生成-2-亚胺(IM吨卜NH),以形成咪唑啉-2- iminato配合物[PhCMX 2(IM吨卜N)](3:M = W,3b中:M =钼)。丙炔复合物[EtCMoX2(NIm t Bu)](4)通过用过量的3-己炔处理3 b得到。配合物3a和3b能够在室温下有效催化各种3-戊炔基苄基醚5和苯甲酸酯7的炔烃交叉复分解反应,得到2-丁炔和相应的二醚6和二酯8。钨配合物3a被证明是闭环炔烃复分解的优良催化剂,[10]环烷10和12是由1,3-双(3-戊炔氧基甲
Increasing the Structural Span of Alkyne Metathesis
作者:Peter Persich、Josep Llaveria、Rudy Lhermet、Teresa de Haro、Robert Stade、Azusa Kondoh、Alois Fürstner
DOI:10.1002/chem.201302320
日期:2013.9.23
new generation of alkyne metathesis catalysts, which are distinguished by high activity and an exquisite functional group tolerance, allows the scope of this transformation to be extended beyond its traditional range. They accept substrates that were previously found problematic or unreactive, such as propargyl alcohol derivatives, electron‐deficient and electron‐rich acetylenes of various types, and