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Stereoselective synthesis of multi‐substituted cyclobutanes with different substituents is still a daunting challenge in organic synthesis. We report here a practical and facile approach to synthesizing all‐trans 2,3,4‐trisubstituted cyclobutanones from readily available dichlorocyclobutanones. The substitution reaction proceeds smoothly via oxyallyl cation intermediates under mild basic conditions...
Herein, we report an efficient and practical protocol for the photoinduced dehalocyclization of ortho‐halophenylacrylamides with formate by the engagement of a CO2 radical anion to access substituted oxindoles. This method proceeds smoothly under mild conditions and exhibits a wide range of substrate as well as remarkable functional group compatibility.
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