Abstract
Highly substituted pyrrolidines 4 are formed in a highly diastereo- and enantioselective 1,3-dipolar cycloaddition reaction of azomethine ylides with electron-deficient alkenes 2. The azomethine ylides are generated from glycinates 1 catalyzed by a chiral zinc(II) bisoxazoline catalyst 3.
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Gothelf, A. S., Gothelf, K. V., Hazell, R. G., & Joørgensen, K. A. (2002). Catalytic asymmetric 1,3-dipolar cycloaddition reactions of azomethine ylides - A simple approach to optically active highly functionalized proline derivatives. Angewandte Chemie - International Edition, 41(22), 4236–4238. https://doi.org/10.1002/1521-3773(20021115)41:22<4236::AID-ANIE4236>3.0.CO;2-W
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