Abstract
The finely powdered dicyclohexylammonium salt of the protected amino acid, (5.1 g, 10 mmol) is added to a two phase system of ethyl acetate (40 ml) and a solution of KHSO4 (2 g, 15 mmol) in water (40 ml) [2]. The mixture is shaken by hand until the dicyclohexylammonium salt is completely dissolved. The aqueous phase is extracted with ethyl acetate (twice, with 10 ml each time). The combined organic layers are washed with water until they are free of sulfate ions, then dried over anhydrous sodium sulfate and evaporated to dryness in vacuo [3].
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© 1994 Springer-Verlag Berlin Heidelberg
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Bodanszky, M., Bodanszky, A. (1994). Conversion of Dicyclohexylammonium Salts of Protected Amino Acids to the Free Acids [1]. In: The Practice of Peptide Synthesis. Springer Lab Manual. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85055-4_39
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DOI: https://doi.org/10.1007/978-3-642-85055-4_39
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-57505-4
Online ISBN: 978-3-642-85055-4
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