scheme36
![Recent advances in organocatalytic cascade reactions for enantioselective synthesis of chiral spirolactone skeletons](https://image.oaes.cc/81dabbbc-923b-43d2-a26d-fe5689f6999d/5406.scheme.36.jpg)
Scheme 36. Spirolactonization reaction of 3-hydroxyoxindoles 69 for construction of chiral spirolactones.
Scheme 36. Spirolactonization reaction of 3-hydroxyoxindoles 69 for construction of chiral spirolactones.
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