A base‐mediated cascade reaction of CF 3 ‐imidoyl sulfoxonium ylides (TFISYs) and diimides has been developed for the preparation of functionalized amidines. In the transformation, a cascade nucleophilic addition and subsequent [2,3]‐sigmatropic rearrangement of sulfoxonium ylide occur to enable an intramolecular migration of dimethyl sulfoxide (DMSO). The unexpected result of the developed protocol demonstrates the chameleonic reactivity of TFISYs.
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Ling et al. (2024) studied this question.
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