Untersuchungen zur Kn�pfung der Peptidbindung mit ?-trifluormethylsubstituierten ?-Aminos�uren
摘要:
The reaction of ol-trifluoromethyl substituted N-(t)butoxycarbonyl amino acids (Boc-TFM-Xaa-OH) 1 with dicyclohexylcarbodiimide results in formation of 2-(t)butoxy-4-trifluoramethyl-5(4H)-oxazolones 2 within minutes. Compounds 2 react with amino acid esters to give Boc protected dipeptide esters 4. However, at room temperature compounds 2 decompose to give Leuchs anhydrides 3, via retro-ene reaction. Therefore, alpha-trifluoromethyl substituted N-(t)butoxycarbonyl amino acids (Boc-TFM-Xaa-OH) are of limited value for peptide synthesis.
Peptide modification by introduction of α-trifluoromethyl α-amino acids via 4-trifluoromethyl-1,3-oxazolidin-2,5-diones
作者:Christian Schierlinger、Klaus Burger
DOI:10.1016/0040-4039(92)88047-9
日期:1992.1
α-Trifluoromethyl substituted α-aminoacids can be introduced into the N-terminal position of peptides on carboxyl group activation via Leuchs anhydrides.