Helvetica Chimica Acta p. 250 - 254 (1980)
Update date:2022-08-04
Topics:
Keller-Schierlein, Walter
Joos, Beda
D,L-4-Oxo-homotyrosine was synthesized by the acetylaminomalonic ester pathway.The optical resolution was carried out by means of the enzyme acylase I.The L-configuration of the enzymatically produced amino acid was confirmed by degradation to L-aspartic acid. 4-Oxo-homotyrosine obtained by degradation of the polypeptide antibiotic echinocandine B has D-configuration, but his optical purity is low.A hypothetical explanation for its formation from the (2S,3S,4S)-3,4-dihydroxyhomotyrosine residue of echinocandine B is proposed.
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