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A highly enantioselective catalytic system for exo‐Diels–Alder reactions was developed based on the newly discovered bispyrrolidine diboronates (BPDB). Activated by various Lewis or Brønsted acids, BPDB can catalyze highly stereoselective asymmetric exo‐Diels–Alder reactions of monocarbonyl‐based dienophiles. When 1,2‐dicarbonyl‐based dienophiles are used, the catalyst can sterically distinguish between...
A highly enantioselective catalytic system for exo‐Diels–Alder reactions was developed based on the newly discovered bispyrrolidine diboronates (BPDB). Activated by various Lewis or Brønsted acids, BPDB can catalyze highly stereoselective asymmetric exo‐Diels–Alder reactions of monocarbonyl‐based dienophiles. When 1,2‐dicarbonyl‐based dienophiles are used, the catalyst can sterically distinguish between...