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Functional group requirements within the peptide H-Pro-Pro-Asp-NH2as a catalyst for aldol reactions

Authors
Journal
Tetrahedron
0040-4020
Publisher
Elsevier
Publication Date
Volume
63
Issue
35
Identifiers
DOI: 10.1016/j.tet.2007.06.010

Abstract

Abstract H-Pro-Pro-Asp-NH 2 1 is a versatile catalyst for asymmetric aldol reactions. In this work, the functional group tolerance within the catalyst structure has been examined. Several analogs of H-Pro-Pro-Asp-NH 2 in which the N-terminal secondary amine or the carboxylic acid in the side chain of the aspartic acid residue is replaced by different functional groups were prepared. Evaluation of their catalytic properties revealed that both the N-terminal secondary amine and the carboxylic acid are important for catalysis. The implications for the reaction mechanism are discussed.

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