Cu-Catalyzed Asymmetric Conjugate Additions of Dialkyl- and Diarylzinc Reagents to Acyclic β-Silyl-α,β-unsaturated Ketones. Synthesis of Allylsilanes in High Diastereo- and Enantiomeric Purity
摘要:
[GRAPHICS]A readily available and simple (MW = 444.5 g/mol) valine-based chiral phosphine is used to promote highly efficient catalytic asymmetric conjugate additions of dialkyl- and diarylzinc reagents to acyclic beta-silyl-alpha,beta-unsaturated ketones. The catalytic asymmetric protocol allows access to versatile allylsilanes that bear a trisubstituted olefin in high diastereo- and enantiomeric purity.
Two 4-silyl-3-buten-2-ones, 2a and 2c, underwent an interesting rearrangement involving migration of the allyl or phenyl group on the silicon atom to the adjacent enone carbon when treated with various bases.
作者:Garry Procter、Andrew T. Russell、Patrick J. Murphy、T.S. Tan、Andrew N. Mather
DOI:10.1016/s0040-4020(01)86648-5
日期:1988.1
Mikami, Koichi; Kishi, Naoyuki; Nakai, Takeshi, Chemistry Letters, 1989, p. 1683 - 1686
作者:Mikami, Koichi、Kishi, Naoyuki、Nakai, Takeshi
DOI:——
日期:——
Bovicelli, P.; Mincione, E.; Parsons, P. J., Synthetic Communications, 1988, vol. 18, # 11, p. 1231 - 1240
作者:Bovicelli, P.、Mincione, E.、Parsons, P. J.
DOI:——
日期:——
Cu-Catalyzed Asymmetric Conjugate Additions of Dialkyl- and Diarylzinc Reagents to Acyclic β-Silyl-α,β-unsaturated Ketones. Synthesis of Allylsilanes in High Diastereo- and Enantiomeric Purity
作者:Monica A. Kacprzynski、Stephanie A. Kazane、Tricia L. May、Amir H. Hoveyda
DOI:10.1021/ol071331k
日期:2007.8.1
[GRAPHICS]A readily available and simple (MW = 444.5 g/mol) valine-based chiral phosphine is used to promote highly efficient catalytic asymmetric conjugate additions of dialkyl- and diarylzinc reagents to acyclic beta-silyl-alpha,beta-unsaturated ketones. The catalytic asymmetric protocol allows access to versatile allylsilanes that bear a trisubstituted olefin in high diastereo- and enantiomeric purity.