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Schmid, M. B. and Zeitler, K. and Gschwind, Ruth M. (2011) Formation and Stability of Prolinol and Prolinol Ether Enamines by NMR: Delicate Selectivity and Reactivity Balances and Parasitic Equilibria. Journal of the American Chemical Society 133 (18), pp. 7065-7074.
Schmid, M. B. and Zeitler, K. and Gschwind, Ruth M. (2011) NMR Investigations on the Proline-Catalyzed Aldehyde Self-Condensation: Mannich Mechanism, Dienamine Detection, and Erosion of the Aldol Addition Selectivity. The Journal of Organic Chemistry 76 (9), pp. 3005-3015.
Schmid, M. B. and Zeitler, K. and Gschwind, R. M. (2010) The elusive enamine intermediate in proline-catalyzed aldol reactions: NMR detection, formation pathway, and stabilization trends. Angew. Chem. Int. Ed. 49 (29), pp. 4997-5003.