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Enantioselective 1,3-Dipolar Cycloaddition Reaction of Nitrones with α,β-Unsaturated Aldehydes Catalyzed by Cationic 3-Oxobutylideneaminatocobalt(III) Complexes.

✍ Scribed by Satoko Kezuka; Natsuki Ohtsuki; Tsuyoshi Mita; Youichi Kogami; Tomoko Ashizawa; Taketo Ikeno; Tohru Yamada


Publisher
John Wiley and Sons
Year
2004
Weight
177 KB
Volume
35
Category
Article
ISSN
0931-7597

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Catalytic Asymmetric 1, 3-Dipolar Cycloa
✍ Kyoung-Chan Lim; Young-Taek Hong; Sunggak Kim 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 212 KB 👁 1 views

## Abstract Using the __C__~2~‐symmetric bis‐oxazoline copper(II) catalyst **6f** as a chiral Lewis acid, α′‐phosphoric enones **2** undergo 1,3‐dipolar cycloaddition with nitrones **3** to provide isoxazolidines **4** with very high enantioselectivity and __endo/exo__ selectivity.