Amino Acid Catalysed Aldol Reactions in Cyclic Carbonate Solvents

[摘要]：Ethylene and propylene carbonates are shown to be alternative polar aprotic solvents for cross-aldol reactions catalysed by the primary amino acids (S)-phenylalanine and (S)-tryptophan. In contrast to the corresponding proline-catalysed reactions, both enantiomers of these naturally occurring, primary amino acids are available at low cost. The optimal catalyst and solvent combination needs to be determined on a substrate by substrate basis.

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