An air and water insensitive visiblelightinduced hydrophosphinylation of unactivated alkenes is reported. A small amount of a simple and cheap compound, salicylaldehyde, is used as a photosensitizer. The reaction is carried out in a basic aqueous solution which enables the deprotonated salicylaldehyde to show visiblelight absorption.
Copper (II)-catalyzed regio- and stereoselective addition of H/P(O)R2 to alkynes
作者:Inna G. Trostyanskaya、Irina P. Beletskaya
DOI:10.1016/j.tet.2014.02.037
日期:2014.4
catalyst for β-E regio- and stereoselective syn-addition of the H–P(O)-bond of diphenylphosphine oxide, H-phosphinates, dialkylphosphites to various alkynes in the synthesis of P(O)-containing alkenes. Without additives and ligands Cu(II)-compounds showed better results than CuI or Ni(acac)2. The catalytic system developed is tolerant to typical organic functional groups present in the alkynes and to the
Catalytic Asymmetric Synthesis of Phosphine Boronates
作者:Valentín Hornillos、Carlos Vila、Edwin Otten、Ben L. Feringa
DOI:10.1002/anie.201502987
日期:2015.6.26
The first catalytic enantioselectivesynthesis of ambiphilic phosphine boronate esters is presented. The asymmetric boration of α,β‐unsaturated phosphine oxides catalyzed by a copper bisphosphine complex affords opticallyactive organoboronate esters that bear a vicinal phosphine oxide group in good yields and high enantiomeric excess. The synthetic utility of the products is demonstrated through stereospecific
Diphosphino-Functionalized MCM-41-Immobilized Rhodium Complex: A Highly Efficient and Recyclable Catalyst for the Hydrophosphinylation of Terminal Alkynes
作者:Fang Yao、Jian Peng、Wenyan Hao、Mingzhong Cai
DOI:10.1007/s10562-012-0781-9
日期:2012.6
this heterogeneous rhodium complex is a highlyefficient catalyst for the hydrophosphinylation of terminalalkynes with diphenylphosphine oxide and can be recovered and recycled by a simple filtration of the reaction solution and used for at least 10 consecutive trials without any decreases in activity.Graphical AbstractHydrophosphinylation of terminalalkynes using diphosphino-functionalized MCM-41-immobilized
Regio- and Stereospecific Cleavage of Silyl- and Disilylepoxides with Lithium Diphenylphosphide
作者:Purificación Cuadrado、Ana M. González-Nogal、M. Angeles Sarmentero
DOI:10.1002/chem.200400239
日期:2004.9.20
react stereospecifically with lithium diphenylphosphide, optionally followed by methylation, to give vinylphosphonium iodides or vinylphosphine oxides resulting from alpha-opening and silylenolethers, vinylsilanes or alpha-hydroxysilanes by beta-opening. On the other hand, alpha,beta- or alpha,alpha-disilylepoxides afforded beta-silyl vinylphosphine oxides or alpha-silylated silylenolethers by alpha-