作者:Victoria A. Pollard、Allan Young、Ross McLellan、Alan R. Kennedy、Tell Tuttle、Robert E. Mulvey
DOI:10.1002/anie.201906807
日期:2019.8.26
tested as a catalyst for hydrophosphination of alkynes, alkenes, and carbodiimides. Based on the collective evidence of stoichiometric reactions, NMR monitoring studies, kinetic analysis, and DFT calculations, a mechanism involving deprotonation, alkyne insertion, and protonolysis is proposed for the [iBu3AlHLi]2 aluminate catalyzed hydrophosphination of alkynes with diphenylphosphine. This study enhances
Yb[bond]imine complex, [Yb(eta(2)-Ph(2)CNPh)(hmpa)(3)], to give alkenylphosphines and phosphine oxides after oxidative workup in good yields under mild conditions. This reaction is also applicable to various carbon[bond]carbon multiple bonds such as conjugated diynes and dienes, allenes, and styrene derivatives. Regio- and stereoselectivity and the scope and limitation of the present reaction clearly
Regioselective Single and Double Hydrophosphination and Hydrophosphinylation of Unactivated Alkynes
作者:Miriam M. I. Basiouny、Deborah A. Dollard、Joseph A. R. Schmidt
DOI:10.1021/acscatal.9b01538
日期:2019.8.2
A lanthanum-based N,N-dimethylbenzylamine complex was used as a precatalyst for both hydrophosphination and hydrophosphinylation of alkynes under mild conditions. In the case of hydrophosphination, the catalyst induced monoaddition with high regiospecificity, yielding only the anti-Markovnikov product, and stereoselectivity that could be controlled on the basis of the reaction conditions. Undertaking
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
Synthesis of Calcium and Ytterbium Complexes Supported by a Tridentate Imino-Amidinate Ligand and Their Application in the Intermolecular Hydrophosphination of Alkenes and Alkynes
作者:Hongfan Hu、Chunming Cui
DOI:10.1021/om201223j
日期:2012.2.13
r}MN(SiMe3)2}(THF)] (M = Ca, Yb; Ar = 2,6-iPr2C6H3) have been synthesized and characterized. They catalyze the intermolecular hydrophosphination of alkenes, dienes, and alkynes with high activity and selectivity under mild conditions. Highly selective 1,4-additions (94–100%) for the conjugated dienes examined have been observed with both catalysts. The calcium complex exclusively catalyzes anti addition
明确定义的钙和络合物[2-NC(Ph)NArC 6 H 4 CHNAr} M N(SiMe 3)2 }(THF)](M = Ca,Yb; Ar = 2,6- i Pr 2 C 6高3)已被合成和表征。它们在温和条件下以高活性和选择性催化烯烃,二烯和炔烃的分子间加氢磷酸化。在两种催化剂上均观察到对所检测的共轭二烯具有高选择性的1,4-加成(94-100%)。钙络合物专门催化向炔烃(包括末端炔烃)的反加成反应,而in在大多数情况下则催化顺式加成反应。钙催化剂可以在相对温和的条件下促进受阻烯烃(如二苯乙烯)的加氢磷酸化。