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Cycloaddition reactionsO 0070 DOI: 10.1002/chin.201026032

Highly Enantioselective Diels—Alder Reactions of Maleimides Catalyzed by Ac-tivated Chiral Oxazaborolidines. — Cationic oxazaborolidines are efficient catalysts in the reaction of maleimides (III), (VIII) or citraconic anhydride (XVI) with the cyclic or linear 1,3-dienes. The reaction proceeds with complete diastereoselectivity and ex-cellent enantioselectivity. — (MUKHERJEE, S.; COREY*, E. J.; Org. Lett. 12 (2010) 3, 632-635; Dep. Chem. Chem. Biol., Harvard Univ., Cambridge, MA 02138, USA; Eng.) — R. Steudel

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