scheme25
![Recent advances in organocatalytic cascade reactions for enantioselective synthesis of chiral spirolactone skeletons](https://image.oaes.cc/81dabbbc-923b-43d2-a26d-fe5689f6999d/5406.scheme.25.jpg)
Scheme 25. Organocatalyzed aldol/cyclization reaction of isothiocyanato butyrolactone 48 with isatins 49. This figure is used with permission from the American Chemical Society[72].
Scheme 25. Organocatalyzed aldol/cyclization reaction of isothiocyanato butyrolactone 48 with isatins 49. This figure is used with permission from the American Chemical Society[72].
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