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2005
Alkenes
Q 0083
29- 081
Stereoselective Synthesis of Multisubstituted Alkenes via Conformationally
Labile Alkenyllithium Species. — The title method is generally applicable to alkenyltellurides bearing different substituents and functional groups. (Z)-Alkenylsilanes are
exclusively obtained in good to excellent yields regardless of the geometrical purity of
the starting material. The current method provides a stereoselective synthetic route to
highly substituted allyl alcohols with defined alkene geometry. The usefullness of (Va)
for the preparation of tri- and tetrasubstituted alkenes possessing all different carbon-substituents with complete stereoselectivity is demonstrated. — (YAMAGO*, S.;
FUJITA, K.; MIYOSHI, M.; KOTANI, M.; YOSHIDA, J.-I.; Org. Lett. 7 (2005) 5,
909-911; Div. Mol. Mater. Sci., Grad. Sch. Sci., Osaka City Univ., Osaka 558, Japan;
Eng.) — Steudel
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