Iron catalysed Negishi cross-coupling using simple ethyl-monophosphines
作者:Caleb A. Brown、Terence A. Nile、Mary F. Mahon、Ruth L. Webster
DOI:10.1039/c5dt00112a
日期:——
Reported is a rare example of the use of monophosphines in iron catalysed Negishi cross-coupling. Substrate scope in terms of alkyl bromide and diaryl zinc reagent is explored.
作者:John P. W. Stelmach、Christine A. Bange、Rory Waterman
DOI:10.1039/c5dt04272k
日期:——
Simple tin derivatives, Cp*2SnCl2 (1) and Ph2SnCl2 (2), catalyze the hydrophosphination of alkene substrates with diphenylphosphine. Competitive dehydrocoupling to give Ph4P2 was observed, but this side reaction can be mitigated when the catalysis is conducted under an H2 atmosphere. Efforts to prepare stable tinbis(phosphido) compounds commonly resulted in decomposition to Ph4P2. Lewis acidic inorganic
简单的锡衍生物Cp * 2 SnCl 2(1)和Ph 2 SnCl 2(2)催化烯烃与二苯基膦的加氢磷酸化。观察到竞争性的脱氢偶联得到Ph 4 P 2,但是当在H 2气氛下进行催化时,该副反应可以减轻。制备稳定的双(锡)双锡锡化合物的努力通常导致分解为Ph 4 P 2。路易斯酸性无机锡化合物不显示脱氢偶联反应性。发现路易斯酸B(C 6 F 5)如图3所示,其能够进行烯烃的加氢磷酸化,但是在测试条件下效果较差。
Photocatalytic Hydrophosphination of Alkenes and Alkynes Using Diphenylphosphine and Triamidoamine‐Supported Zirconium
作者:Bryan T. Novas、Christine A. Bange、Rory Waterman
DOI:10.1002/ejic.201801079
日期:2019.3.31
Reactions of alkene or alkyne with diphenylphosphine and catalytic [κ5‐N,N,N,N,C‐(Me3SiNCH2CH2)2NCH2CH2NSiMe2CH2]Zr (1) are greatly enhanced under photolysis, providing viable catalytic hydrophosphination with a broad substrate scope. Whereas diphenylphosphine had been an inaccessible substrate under thermal conditions, complete conversion of alkene substrates to tertiary phosphine is achieved in as
Heteroleptic Alkyl and Amide Iminoanilide Alkaline Earth and Divalent Rare Earth Complexes for the Catalysis of Hydrophosphination and (Cyclo)Hydroamination Reactions
precatalysts for the cyclohydroamination of terminal aminoalkenes and the intermolecular hydroamination and intermolecular hydrophosphination of activatedalkenes. Metals with equal sizes across alkalineearth and rare earth families display almost identical apparent catalytic activity and selectivity. Hydrocarbyl complexes are much better catalyst precursors than their amido analogues. In the case of cyclohydroamination
Visible Light Photocatalysis Using a Commercially Available Iron Compound
作者:Justin K. Pagano、Christine A. Bange、Sarah E. Farmiloe、Rory Waterman
DOI:10.1021/acs.organomet.7b00499
日期:2017.10.23
reactivity over the same transformations using 1 or related CpFeMe(CO)2 under UV irradiation, consistent with the notion that hydrophosphination with 1 proceeds via formation of CpFe(CO)2•. These results demonstrate that catalyst selection can avail the use of commercially available LED bulbs as photon sources, potentially replacing mercury arc lamps or other energy intensive processes in known or new catalytic