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.
AYREY, PETER M.;WARREN, STUART, TETRAHEDRON LETT., 30,(1989) N4, C. 4581-4584
作者:AYREY, PETER M.、WARREN, STUART
DOI:——
日期:——
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
Extension of the horner-wittig reaction to the synthesis of -alkenes with chiral substituents: Stereochemical control by acyl transfer
作者:Peter M. Ayrey、Stuart Warren
DOI:10.1016/s0040-4039(01)80750-4
日期:1989.1
crystalline diastereoisomers of hydroxyalkyl phosphine oxides (and hence functionalised -alkenes) can be isolated, even when other chiral centres are present in the molecule, if they are made by acyltransfer.