Summary
N-Protected dipeptides containing L-3-thia-analogues of phenylalanine, p-nitro-phenylalanine, lysine and leucine respectively were prepared applying an enantioselective enzymatic reaction step. Racemic synthetic intermediates of the type acyl-NH-CH(R1)-CO-D,L-NH-CH(S-R2)-COOBzl were selectively deprotected at the C-terminus by enzymatic hydrolysis using thermitase or trypsin.
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Abbreviations
- Ac:
-
acetyl
- AcOEt:
-
ethyl acetate
- AcOH:
-
acetic acid
- Boc:
-
tert.-butyloxycarbonyl
- Bz:
-
benzoyl
- Bzl:
-
benzyl
- DMF:
-
dimethyl-formamide
- EtOH:
-
ethanol
- THF:
-
tetrahydrofuran
- Z:
-
benzyloxycarbonyl
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Dedicated to Prof. D. Cavallini at the occasion of his 75th birthday.
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Hermann, P., Baumann, H., Herrnstadt, C. et al. Thia-analogues of amino acids synthesis of peptide derivatives containing 3-thia-analogues of amino acids. Amino Acids 3, 105–118 (1992). https://doi.org/10.1007/BF00806012
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DOI: https://doi.org/10.1007/BF00806012