Cobalt(II)-Catalyzed 1,4-Addition of Organoboronic Acids to Activated Alkenes: An Application to Highly<i>cis</i>-Stereoselective Synthesis of Aminoindane Carboxylic Acid Derivatives
It all adds up: The 1,4‐addition of organoboronicacids to activatedalkenes catalyzed by [Co(dppe)Cl2] is described. A [3+2]‐annulation reaction of ortho‐iminoarylboronic acids with acrylates to give various aminoindanecarboxylicacidderivatives with cis‐stereoselectivity is also demonstrated (see scheme; dppe=1,2‐bis(diphenylphosphino)ethane).