Abstract
The synthesis of pentafluorophenyl,2,4,5-trichlorophenyl and pentachlorophenyl esters ofFmoc-amino acids has been accomplished via Fmoc-amino acidchlorides as intermediates. A two phase system with a mildin-organic base (3% NaHCO3) in the aqueous layer was used. The esterification reaction was clean and complete in about2–3 hr. All the esters prepared have been obtained in goodyield and are fully characterised.
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