Novel, Stereoselective and Stereospecific Synthesis of Allenylphosphonates and Related Compounds via Palladium-Catalyzed Propargylic Substitution
作者:Marcin Kalek、Jacek Stawinski
DOI:10.1002/adsc.201100119
日期:2011.7
allenylphosphonates and related compounds based on a palladium(0)‐catalyzedreaction of propargylic derivatives with H‐phosphonate, H‐phosphonothioate, H‐phosphonoselenoate, and H‐phosphinate esters. The reaction is stereoselective and stereospecific, and provides a convenient entry to a vast array of allenylphosphonates and their analogues with diverse substitution patterns in the allenic moiety and at the phosphorus
An efficient palladium-catalysed reaction of propargyl halides tosylates and acetates with terminal alkynes
作者:Sylvie Gueugnot、Gérard Linstrumelle
DOI:10.1016/s0040-4039(00)79245-8
日期:1993.6
In the presence of palladium complexes and copper iodide, the reaction of propargyl halides with terminal alkynes proceeds rapidly to give conjugated allenynes in high yield. Propargyl acetates and tosylates are also suited to the preparation of such allenes.
syntheses of the allenes (±)-1, (±)-4 and (±)-6 as well as of the enriched samples (-)-1, (-)-4 and (-)-6 are described. 1H NMR shifts and splittings induced by a mixture of the achiral salt Ag(fod) and the opticallyactive complex (+)-Yb(hfbc)3 are given. This procedure is recommended by the magnitude of such splittings as a means of determining the enantiomeric purity of 1,3-disubstituted allenic hydrocarbons
描述了烯丙基(±)-1,(±)-4和(±)-6以及富集样品(-)-1,(-)-4和(-)-6的合成。给出了由非手性盐Ag(fod)和旋光络合物(+)-Yb(hfbc)3的混合物引起的1 H NMR位移和分裂。这种分离的程度推荐该方法作为确定1,3-二取代的烯丙基烃的对映体纯度的手段。(-)-1和(-)-5的结果代表了该绝对方法的首次应用。
10.3998/ark.5550190.p009.846
作者:Banert, Klaus、Hagedorn, Manfred、Hemeltjen, Claudia、Ihle, Andreas、Weigand, Kevin、Priebe, Hanno
DOI:10.3998/ark.5550190.p009.846
日期:——
Baudouy, Rene; Gore, Jacques, Journal of Chemical Research, Miniprint, 1981, # 9, p. 3081 - 3094