scheme39
![Recent advances in organocatalytic cascade reactions for enantioselective synthesis of chiral spirolactone skeletons](https://image.oaes.cc/81dabbbc-923b-43d2-a26d-fe5689f6999d/5406.scheme.39.jpg)
Scheme 39. Spirolactonization reaction of 3-hydroxyoxindoles 69 and 3-trifluoroethylidene oxindoles 74. This figure is used with permission from the American Chemical Society[102].
Scheme 39. Spirolactonization reaction of 3-hydroxyoxindoles 69 and 3-trifluoroethylidene oxindoles 74. This figure is used with permission from the American Chemical Society[102].
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