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 CF 3 CONHCH 2 CH 2· CONHCH (CH 2 C 3 H 3 N 2) COOCH 3 and N-trifluoroacetyl-β-alanyl-l-histidine CF 3 CONHCH 2 CH 2 CONHCH·(CH 2 C 3 H 3 ...
