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  • Rate Limiting Step Precedes...
    Zhu, Hui; Clemente, Fernando R; Houk, K. N; Meyer, Matthew P

    Journal of the American Chemical Society, 02/2009, Volume: 131, Issue: 5
    Journal Article

    The archetypical proline-catalyzed intramolecular aldol reaction, the Hajos-Parrish-Eder-Sauer-Wiechert reaction, has served as a model reaction for the mechanistic study of the ever-growing class of proline-catalyzed conversions. Experimental measurements of the 13C kinetic isotope effects for this reaction show conclusively that carbon−carbon bond formation is not rate-limiting.