Rhodium-catalysed racemisation of N-acyl α-amino acids
✍ Scribed by Martin J Hateley; Daniel A Schichl; Hans-Jörn Kreuzfeld; Matthias Beller
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- French
- Weight
- 157 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
The first transition metal-catalysed racemisation of N-acyl α-amino acids, which is of importance for kinetic resolution processes, is described. Enantiomerically pure N-acyl α-amino acids were efficiently racemised under mild conditions using various rhodium complexes as catalysts, e.g. [Rh(cod)Cl] 2 , in the presence of phosphines.
📜 SIMILAR VOLUMES
p. 521, line 9, phthaloyl should be phthalyliminonethyl. p. 521, line 10, propenoate (la) should be butanoate (la). p. 521, line 11, pentenoate (6i) should be buterloate (6a). ## F. 5Z, Table 1, Value of NMR spectrum should be ppm.
In previous papers, l-3 we reported the synthesis of a,S-unsaturated N-acyla-amino acid ester (1) by the condensation of ethyl a-oxocarboxylate with amide or by the treatment of N-acetoxy-N-acyl-a-amino acid ester with Et3N. Up to date,