International Journal of Peptide and Protein Reseach 1996-07-01

Side reactions in the pyroglutamic acid-7-amino-4-methylcoumarin synthesis.

D Zicane, M Petrova, Z Tetere, G Kreishman, E Brooks, J Karlson, U Kalejs

Index: Int. J. Pept. Protein Res. 48(1) , 56-8, (1996)

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Abstract

N-Formylpyroglutamic acid-7-amido-4-methylcoumarine and pyroglutamyl-pyroglutamic acid-7-amido-4-methylcoumarin are the major products in the synthesis of pyroglutamic acid-7-amido-4-methylcoumarin by phosphorus pentachloride in dimethylformamide and dicyclohexylcarbodiimide under pyridine activation.