Tetrahedron Letters p. 6755 - 6758 (1992)
Update date:2022-08-02
Topics:
Williams
Fegley
The asymmetric synthesis of (S)-(-)-cucurbitine in greater than 98% ee is described. The key step of the synthesis involves 1,3-dipolar cycloaddition of azomethine ylide (1) to α,β-dehydrolactone (3) to give pyrrolidine (6) as a single diastereomer.
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(1991)
