Excitation of acyclic trisubstituted alkenes via triplet energy transfer for diastereo- and enantioselective [2 + 2] photocycloaddition
Photochemistry offers a powerful platform for enabling unique bond cleavage and formation. However, achieving precise stereochemical control while suppressing persistent racemic background reactions remains a fundamental challenge in this field. Herein, we report a highly enantio- and diastereoselective [2 + 2] photocy...