Dehydrogenative Silylation of Terminal Alkynes Catalyzed by Ytterbium−Imine Complexes
摘要:
Catalytic dehydrogenative silylation of terminal alkynes with hydrosilanes has been achieved by using divalent Yb-imine complexes; The reaction with mono-, di-, and trihydrosilanes gave the corresponding alkynylsilanes in good yields. alpha,omega-Diynes were similarly silylated at both termini. Thus, oligomers were obtained from the diynes and dihydrosilanes. In addition, it has been found that the imine complexes exhibit catalytic activity for redistribution of the silyl groups of the alkynylsilanes and for Si-Si bond fission of disilanes.
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 dehydrogenative silylation of terminal alkynes with hydrosilanes has been achieved by using divalent Yb-imine complexes; The reaction with mono-, di-, and trihydrosilanes gave the corresponding alkynylsilanes in good yields. alpha,omega-Diynes were similarly silylated at both termini. Thus, oligomers were obtained from the diynes and dihydrosilanes. In addition, it has been found that the imine complexes exhibit catalytic activity for redistribution of the silyl groups of the alkynylsilanes and for Si-Si bond fission of disilanes.