Abstract
Conditions have been developed for the synthesis of N-trifluoroacetyl-β-alanine, N-tifluoroacetyl-β-alanyl chloride, and N-trifluoroacetyl-β-alanine 4-nitrophenyl ester. These compounds reacted with histidine methyl ester or sodium salt to give N-trifluoroacetyl-β-alanyl-l-histidine methyl ester CF3CONHCH2CH2·CONHCH(CH2C3H3N2)COOCH3 and N-trifluoroacetyl-β-alanyl-l-histidine CF3CONHCH2CH2CONHCH·(CH2C3H3N2)COOH. Their hydrolysis with a solution of sodium hydroxide in aqueous ethanol, followed by acidification with trifluoroacetic acid, led to the formation of β-alanyl-l-histidine (l-carnosine).
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