Copper-Catalyzed Conjugate Addition of a Bis(triorganosilyl) Zinc and a Methyl(triorganosilyl) Magnesium
作者:Martin Oestreich、Barbara Weiner
DOI:10.1055/s-2004-831331
日期:——
A practical copper-catalyzed conjugate silylation of α,β-unsaturated carbonyl compounds 4 utilizing bis(triorganosilyl) zinc reagent 3 is described. Moreover, mixed methyl(triorganosilyl) magnesium 7 also transfers its silyl ligand to simple enones 4 under copper catalysis.
Silyl Cuprate Couplings: Less Silicon, Accelerated, Yet <i>Catalytic</i> in Copper
作者:Bruce H. Lipshutz、Joseph A. Sclafani、Toshikatsu Takanami
DOI:10.1021/ja980152i
日期:1998.4.1
Conjugate addition of dimethylphenylsilyllithium to α,β-unsaturated carbonyl compounds mediated by sub-stoichiometric quantities of dimethylzinc
作者:Bonnie L. MacLean、Kimberlea A. Hennigar、Kevin W. Kells、Robert D. Singer
DOI:10.1016/s0040-4039(97)01776-0
日期:1997.10
Dimethylphenylsilyllithium undergoes conjugate addition to a variety of alpha,beta-unsaturated enones in the presence of sub-stoichiometric amounts of dimethylzinc. Down to 10 mol % of Me2Zn facilitates these reactions to afford good to excellent yields of beta-silylated products. This catalytic behavior is displayed when the Me2Zn used is generated in situ from the addition of methyllithium to zinc (II) iodide or when used directly from a commercial source. This methodology in which sub-stoichiometric quantities of the reactive organometallic reagent are present at a given time may provide a route for catalytic enantioselective conjugate addition of trialkylsilyl moieties to enones. (C) 1997 Elsevier Science Ltd.
Crump, Roger A. N. C.; Fleming, Ian; Urch, Christopher J., Journal of the Chemical Society. Perkin transactions I, 1994, # 6, p. 701 - 706
作者:Crump, Roger A. N. C.、Fleming, Ian、Urch, Christopher J.
DOI:——
日期:——
AGER, D. J.;FLEMING, I.;PATEL, SH. K., J. CHEM.SOC. PERKIN TRANS., 1981, N 9, 2520-2526