73006-81-2Relevant academic research and scientific papers
PdCl2(CH3CN)2-catalyzed regioselective C-H olefinations of 2-amino biaryls with vinylsilanes as unactivated alkenes
Sun, Qiao-Ying,Li, Zhao,Xu, Zheng,Zheng, Zhan-Jiang,Cao, Jian,Yang, Ke-Fang,Cui, Yu-Ming,Xu, Li-Wen
, p. 6229 - 6232 (2019)
The first example of palladium-catalyzed chelation-assisted C-H olefination of 2-amino biaryls using readily available vinylsilanes as unactivated olefinating reagents has been developed, affording valuable arylated vinylsilane compounds in moderate to excellent yields and with exclusive (E)-selectivities.
Preparation method for arylvinylsilane compound
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Paragraph 0042, (2020/02/14)
The invention relates to the technical field of chemical synthesis and discloses a preparation method for an arylvinylsilane compound. The preparation method comprises the following steps: adding a raw material A, a raw material B, a catalytic precursor and an oxidant into a reaction medium, and conducting reacting at 25-80 DEG C for 1-24 h; and then conducting separating to obtain the arylvinylsilane compound, wherein the raw material A is an aromatic hydrocarbon compound containing a heteroatom orienting group, the raw material B is vinylsilane and the catalytic precursor is a palladium salt. According to the preparation method, the vinylsilane and the aromatic hydrocarbon compound containing the heteroatom orienting group are used as the raw materials, the palladium salt is used as thecatalytic precursor and the oxidants including silver acetate and the like are added; then the components are subjected to a one-step reaction in an organic solvent to synthesize a target product. Themethod provided by the invention has the advantages of relatively good adaptability to substrates containing substituent groups having different properties, high yield, good stereoselectivity, no need of ligands, no need of protection of inert gas and simplicity in operation.
Synthesis of Ti(iv) complexes of donor-functionalised phenoxy-imine tridentates and their evaluation in ethylene oligomerisation and polymerisation
Suttil, James A.,Shaw, Miranda F.,McGuinness, David S.,Gardiner, Michael G.,Evans, Stephen J.
, p. 9129 - 9138 (2013/07/27)
A number of analogues of the Mitsui Chemicals ethylene trimerisation system (IV) have been explored, in which one of the donor atoms have been modified. Thus, a series of mono-anionic tridentate phenoxy-imine (3-(t-butyl)-2-(OH)- C6H4CN(C(CH3)2CH2OMe) 1, 3-(adamantyl)-2-(OH)-C6H4CN(2′-(2′′- (SMe)C6H4)-C6H4) 2, 3-(t-butyl)-2-(OSiMe3)-C6H4CN(C(CH 3)2CH2OMe) 3) or phenoxy-amine (3,5-di(t-butyl)-2-(OH)-C6H4CH2-N(2′- (2′′-(OMe)C6H4)-C6H4) 4) ligands have been prepared and reacted with TiCl4 or TiCl 4(thf)2 to give the mono-ligand complexes 5-7. The solid state structures of compounds 4-6 have been determined. Complexes 5-7 have been tested for their potential as ethylene oligomerisation/polymerisation systems in conjunction with MAO activator and benchmarked against the Mitsui phenoxy-imine trimerisation system IV. While the phenoxy-amine complex 6 shows a propensity for polymer formation, the phenoxy-imine complexes 5 and 7 show somewhat increased formation of short chain LAOs. Complex 5 is selective for 1-butene in the oligomeric fraction, while 7 displays liquid phase selectivity to 1-hexene. As such 7, which is a sulfur substituted analogue of the Mitsui system IV, displays similar characteristics to the parent catalyst. However, its utility is limited by the lower activity and predominant formation of polyethylene.
