Catalytic synthesis of vinylphosphanes via calcium-mediated intermolecular hydrophosphanylation of alkynes and butadiynes
作者:Tareq M.A. Al-Shboul、Villö K. Pálfi、Lian Yu、Robert Kretschmer、Katja Wimmer、Reinald Fischer、Helmar Görls、Markus Reiher、Matthias Westerhausen
DOI:10.1016/j.jorganchem.2010.08.058
日期:2011.1
The calcium complex [(thf)4Ca(PPh2)2] (1) is a very effective catalyst for the hydrophosphanylation of substituted alkynes of the type R–CC–R (R = Me, Ph) yielding (E)-1,2-diphenyl-1-diphenylphosphanylethene (2a) and (Z)-1-phenyl-2-diphenylphosphanyl-1-propene (2b). The calcium-mediated hydrophosphanylation of butadiynes of the type R–CC–CC-R (R = Me, SiMe3, Ph, Mes, tBu) proceeds less selectively
钙络合物[(thf)4 Ca(PPh 2)2 ](1)是一种非常有效的催化剂,可用于进行R–C C–R型(R = Me,Ph)的取代炔烃的氢磷酰化反应,产生(E)- 1,2-二苯基-1-二苯基膦烯基(2a)和(Z)-1-苯基-2-二苯基膦基-1-丙烯(2b)。RC C– CC C-R类型的丁二炔的钙介导的氢膦酰化作用(R = Me,SiMe 3,Ph,Mes,t Bu)进行的选择性较低,并且获得了多种产品,例如1,4-取代的1,4 -双(二苯基膦基)-1,3-丁二烯(3),1,4-二苯基-1,2-双(二苯基膦基)-1,3-丁二烯(4)和1,4-二(叔丁基)-1,4-双(二苯基膦基)丁1 2-二烯(5)。除了这些区域异构体之外,还获得了关于C = C双键[(E)/(Z)异构体]的几种构型异构体。可以通过首先将催化剂1的Ca–P键添加到C中来制定催化循环C三键总是导致形成中间体,该中间体在1位