Intermolecular hydrophosphination of alkynes and related carboncarbon multiple bonds catalyzed by ytterbium–imine complexes
摘要:
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.
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.
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.