"Extreme" Ugi Reactions With Some Complex alpha-Amino Acids

[摘要]：The Ti(IV)-catalyzed Ugi condensation of alpha-amino acids with electron-rich aromatic aldehydes performs adequately even with sterically demanding alpha-amino carboxylate salts. The reaction occurs diastereoselectively, in some cases with virtually complete diastereoselectivity. A stereochemical rationale for the reaction is proposed.

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