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Page 48 of 54 Yang et al. Chem Synth 2023;3:7 https://dx.doi.org/10.20517/cs.2022.38
Scheme 64. Spirolactonization reaction of isatins 106 and γ-fluoroenals 130. This figure is used with permission from the Royal Society
[139]
of Chemistry .
Scheme 65. Spirolactonization reaction of isatins 106 and γ-preoxidized enal 132. This figure is used with permission from Wiley-VCH
Verlag [140] .