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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] .
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