Synthesis of lanthanide(II)–imine complexes and their use in carbon–carbon and carbon–nitrogen unsaturated bond transformation
作者:Ken Takaki、Kimihiro Komeyama、Katsuomi Takehira
DOI:10.1016/j.tet.2003.06.003
日期:2003.12
1 quantitatively, the structure of which was characterized by X-ray analysis. The imine complexes 1 catalyzed dehydrogenativesilylation of terminal alkynes, hydrosilylation of imines and alkenes, and intermolecular hydrophosphination of alkynes. Moreover, dehydrogenative double silylation of conjugated dienes was achieved with 1.
Synthesis of Calcium and Ytterbium Complexes Supported by a Tridentate Imino-Amidinate Ligand and Their Application in the Intermolecular Hydrophosphination of Alkenes and Alkynes
作者:Hongfan Hu、Chunming Cui
DOI:10.1021/om201223j
日期:2012.2.13
r}MN(SiMe3)2}(THF)] (M = Ca, Yb; Ar = 2,6-iPr2C6H3) have been synthesized and characterized. They catalyze the intermolecular hydrophosphination of alkenes, dienes, and alkynes with high activity and selectivity under mild conditions. Highly selective 1,4-additions (94–100%) for the conjugated dienes examined have been observed with both catalysts. The calcium complex exclusively catalyzes anti addition
明确定义的钙和络合物[2-NC(Ph)NArC 6 H 4 CHNAr} M N(SiMe 3)2 }(THF)](M = Ca,Yb; Ar = 2,6- i Pr 2 C 6高3)已被合成和表征。它们在温和条件下以高活性和选择性催化烯烃,二烯和炔烃的分子间加氢磷酸化。在两种催化剂上均观察到对所检测的共轭二烯具有高选择性的1,4-加成(94-100%)。钙络合物专门催化向炔烃(包括末端炔烃)的反加成反应,而in在大多数情况下则催化顺式加成反应。钙催化剂可以在相对温和的条件下促进受阻烯烃(如二苯乙烯)的加氢磷酸化。
Intermolecular hydrophosphination of alkynes and related carboncarbon multiple bonds catalyzed by ytterbium–imine complexes
Catalytic intermolecular hydrophosphination of alkynes with Ph,PH has been achieved by using a ytterbium-imine complex, [Yb(eta (2)-Ph(2)CNPh)(hmpa)(6)]. Thus, both terminal and internal alkynes were converted in high yields to the corresponding alkenylphosphines or phosphine oxides after oxidative workup. The present method was also applicable to various carbon-carbon multiple bonds such as conjugated diynes and dienes, allenes and styrene derivatives. (C) 2001 Elsevier Science Ltd. All rights reserved.
Intermolecular Hydrophosphination of Alkynes and Related Carbon−Carbon Multiple Bonds Catalyzed by Organoytterbiums
Yb[bond]imine complex, [Yb(eta(2)-Ph(2)CNPh)(hmpa)(3)], to give alkenylphosphines and phosphine oxides after oxidative workup in good yields under mild conditions. This reaction is also applicable to various carbon[bond]carbon multiple bonds such as conjugated diynes and dienes, allenes, and styrene derivatives. Regio- and stereoselectivity and the scope and limitation of the present reaction clearly