Copper‐Catalyzed C−P Cross‐Coupling of (Cyclo)alkenyl/Aryl Bromides and Secondary Phosphine Oxides with
<i>in</i>
<i>situ</i>
Halogen Exchange
作者:Paweł Woźnicki、Marek Stankevič
DOI:10.1002/ejoc.202100456
日期:2021.6.25
A protocol for copper-catalyzed halogen exchange/C−P cross-coupling between (cyclo)alkenyl/arylbromides and secondary phosphine oxides has been developed. The addition of sodium iodide increases the yield of the cross-coupling by promoting in situ halogen exchange of organic bromides to the corresponding iodides.
Constant current electrolysis of triphenylphosphine in dichloromethane at a graphite anode in the presence of cycloalkenes gave the corresponding 1-cycloalkenylphosphonium salts in reasonable yields.
Abnormal Ring Opening of 1,2-Epoxyalkyldiphenylphosphine Oxides with Lithium Aluminum Hydride to Form 2-Hydroxy-alkyldiphenylphosphine Oxides
作者:Hiroyuki Imoto、Mitsuji Yamashita
DOI:10.1055/s-1988-27557
日期:——
Ring opening of 1,2-epoxyalkyldiphenylphosphine oxides with LiAlH4 gives 2-hydroxyalkyldiphenylphosphine oxides in good yield. This is the first example of ring opening of 1,2-epoxyalkyldiphenylphosphine oxides to give the corresponding 2-hydroxy derivatives.