Highly Stereoselective Synthesis of Vinylsilanes from Carbonyl Compounds
作者:José Barluenga、José L. Fernández-Simón、José M. Concellón、Miguel Yus
DOI:10.1055/s-1988-27526
日期:——
The in situ generated (chlorolithiomethyl)trimethylsilane reacts at - 60°C to - 45°C with different aldehydes or ketones 1 to afford, after lithiation with lithium naphthalenide at - 78 °C to 20 °C, vinylsilanes 5a-b in a stereoselective manner.
Regioselectivity of the Singlet Oxygen Ene Reaction (Schenck Reaction) with Vinylsilanes
作者:Waldemar Adam、Markus J. Richter
DOI:10.1021/jo00091a020
日期:1994.6
The ene reaction-of singlet oxygen and vinylsilanes 1 with various substitution patterns and double-bond geometry has been studied. beta-Silyl allylic hydroperoxides 2 were the major products of the photooxygenation, accompanied by smaller amounts of alpha,beta-unsaturated ketones 3. The latter derive from decomposition of the regioisomeric alpha-hydroperoxy silanes 4 by elimination of silanol. Regioselectivities up to 97:3 were observed for vinylsilanes with a methyl group geminal to the silyl group and with cyclic derivatives. Z-Configurated substrates showed lower regioselectivity and reactivity. Elongation of the carbon chain at the geminal position also increased the amount enone formed. These results are rationalized in terms of stereoelectronic effects imposed by the silyl group on the ring-opening of the perepoxide intermediate.
Zaitseva, G. S.; Livantsova, L. I.; Bekker, R. A., Journal of general chemistry of the USSR, 1983, vol. 53, # 9, p. 1867 - 1874
作者:Zaitseva, G. S.、Livantsova, L. I.、Bekker, R. A.、Baukov, Yu. I.、Lutsenko, I. F.
DOI:——
日期:——
The Stereochemistry of the Addition of Silicochloroform to Acetylenes
作者:Robert A. Benkeser、Richard A. Hickner
DOI:10.1021/ja01552a072
日期:1958.10
The Stereochemistry of the Addition of Silicochloroform to Acetylenes. A Comparison of Catalyst Systems
作者:Robert A. Benkeser、Merwyn L. Burrous、Lee E. Nelson、Joseph V. Swisher