Abstract 3,3‐Disubstituted oxindoles are important intermediates and building blocks in organic synthesis. Herein, a domino procedure for the synthesis of various 3,3‐disubstituted oxindole from indoles has been developed. Without transition metal catalyst, indoles were selectivity dearomatized in an efficient manner without any halogen additives.
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Gao et al. (2020) studied this question.
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