Ytterbium-catalyzed dual intermolecular hydrophosphination: synthesis of bis(phosphinyl)dienes and bis(alkenyl)phosphine oxides
作者:Kimihiro Komeyama、Daisuke Kobayashi、Yuta Yamamoto、Katsuomi Takehira、Ken Takaki
DOI:10.1016/j.tet.2005.12.049
日期:2006.3
(2), to give the corresponding 1,4-bis(diphenylphosphinyl)buta-1,3-dienes in high yields after oxidative work-up. Distribution of the four possible stereoisomers sharply depended on substituents of the substrates. (Z,Z)-Isomers were predominantly obtained from the disubstituted diynes, together with minor (Z,E)-isomers. On the other hand, the reaction of the terminal diynes provided major (E,Z) and minor
用2当量二苯基膦缀合的二炔的双分子间hydrophosphination由镱络合物催化,镱(η 2 -Ph 2 CNPH)(HMPA)3(1)和Yb [N(森达3)2 ] 3(HMPA)2(2),经过氧化后可以高产率得到相应的1,4-双(二苯基亚膦酰基)丁1,3-二烯。四种可能的立体异构体的分布严重取决于底物的取代基。(Z,Z)-异构体主要是由双取代的二炔化合物和次要的(Z,E)异构体。另一方面,末端二炔的反应提供了主要的(E,Z)和次要的(E,E)丁二烯。1,4-二叔丁基-1,3-二炔仅被转化为烯丙化合物。此外,还用1和2进行了使用苯膦的双氢磷酸化。因此,使2当量的芳族炔烃与PhPH 2反应并随后氧化,优先获得(Z,Z)-立体异构体的双(烯基)氧化膦。