Sodium Hydroxide → HCID 69545603, compound

Participants

Reaction Steps

200 mg (0.487 mmol) of N-tert-butoxycarbonyl-3-(4-alloxycarbonyl-2-aminophenylthio)-L-alanine methyl ester (96.7%) was added to a system consisting of 2 to 5 ml of an organic co-solvent (see following table) and 20 ml buffer solution (0.1M sodium chloride; 3 mM sodium phosphate pH 7.0) under vigorous stirring. Alcalase 2.4 L [a subtilisin Carlsberg from Novo Nordisk, amount see following table] was added and the pH maintained at 7.0 under vigorous stirring by the controlled addition (pH-static) of 0.1N sodium hydroxide solution. The reaction was monitored by the consumption of titrating agent, and the formation of the product confirmed by HPLC.

Provenance & Evidence