Rapid Metal-Free Formation of Free Phosphines from Phosphine Oxides
作者:Cei B. Provis-Evans、Emma A. C. Emanuelsson、Ruth L. Webster
DOI:10.1002/adsc.201800723
日期:2018.10.18
A rapid method for the reduction of secondary phosphineoxides under mild conditions has been developed, allowing simple isolation of the corresponding free phosphines. The methodology involves the use of pinacol borane (HBpin) to effect the reduction while circumventing the formation of a phosphine borane adduct, as is usually the case with various other commonly used borane reducing agents such as
Facile, Catalytic Dehydrocoupling of Phosphines Using β‐Diketiminate Iron(II) Complexes
作者:Andrew K. King、Antoine Buchard、Mary F. Mahon、Ruth L. Webster
DOI:10.1002/chem.201503399
日期:2015.11.2
Catalytic dehydrocoupling of primary and secondary phosphines has been achieved for the first time using an iron pre‐catalyst. The reaction proceeds under mild reaction conditions and is successful with a range of diarylphosphines. A proton acceptor is not needed for the transformation to take place, but addition of 1‐hexene does allow for turnover at 50 °C. The catalytic system developed also facilitates
Barium complexes with crown-ether-functionalised amidinate and iminoanilide ligands for the hydrophosphination of vinylarenes
作者:Erwann Le Coz、Hanieh Roueindeji、Thierry Roisnel、Vincent Dorcet、Jean-François Carpentier、Yann Sarazin
DOI:10.1039/c9dt01512d
日期:——
The detailed multistep syntheses of two nitrogen-based sterically congested iminoanilidine and amidine proligands bearing a tethered 15-member aza-ether-crown macrocycle, namely I^Acrown}H and Amcrown}H, are reported. These proligands react with [BaN(SiMe2H)2}2·(thf)n] to generate the heteroleptic barium complexes [I^Acrown}BaN(SiMe2H)2] (5) and [Amcrown}BaN(SiMe2H)2] (6) in high yields. These
CsOH-promoted P-alkylation: a convenient and highly efficient synthesis of tertiary phosphines
作者:Matthew T Honaker、Benjamin J Sandefur、James L Hargett、Alicia L McDaniel、Ralph Nicholas Salvatore
DOI:10.1016/j.tetlet.2003.09.117
日期:2003.11
and efficient method for the synthesis of tertiary phosphines and ditertiaryphosphines has been developed. In the presence of cesium hydroxide, molecular sieves and DMF at room temperature, various secondary phosphines and alkyl bromides were examined, and the results have demonstrated that this methodology offers a general synthetic procedure to produce tertiary phosphines in moderate to high yields
Catalyst- and solvent-free hydrophosphination and multicomponent hydrothiophosphination of alkenes and alkynes
作者:Yanina Moglie、María José González-Soria、Iris Martín-García、Gabriel Radivoy、Francisco Alonso
DOI:10.1039/c6gc00903d
日期:——
The hydrophosphination of carbon-carbon multiple bonds has been generally performed under acid, base or metal catalysis in different solvents. Herein, alkyl and alkenyl tertiary phosphines are obtained by the addition...