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(−)-Sparteine-mediated stereoselective intramolecular conjugate addition reactions of dienes and enynes

✍ Scribed by Martin Oestreich; Dieter Hoppe


Book ID
104260890
Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
232 KB
Volume
40
Category
Article
ISSN
0040-4039

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ChemInform Abstract: (-)-Sparteine-Media
✍ M. OESTREICH; R. FROEHLICH; D. HOPPE 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 2 views

Sparteine-Mediated Stereoselective Intramolecular Carbolithiation of Alkynes. -Asymmetric deprotonation of the chiral 4-substituted 5-hexynyl carbamates (I) by sBuLi/(-)-sparteine and subsequent regioselective 5-exo-dig cyclization of the intermediate enantioenriched carbanionic pairs yields the fi