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.

  • 出版日期2011-6