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Free keywords:
aldol reaction; asymmetric catalysis; organocatalysis; amino acids
Abstract:
32 years after the first, and still the only, catalytic asymmetric intramolecular aldol reaction was published in this journal, the proline‐catalyzed Hajos–Parrish–Eder–Sauer–Wiechert reaction is extended for the first time to catalytic asymmetric enolexo aldolizations. The process provides substituted cyclohexanes in excellent diastereo‐ and enantioselectivities. For example, heptanedial is converted into the corresponding cyclic anti‐configured aldol in 99 % ee (see scheme).
