Abstract
1) Synthesis of the peptides l-histidyl-l-phenylalanyl-l-arginyl-l-tryptophan, l-histidyl-l-phenylalanyl-l- arginyl -l-tryptophyl-glycine and l-glutamyl-l-histidyl-l-phenylalanyl-l-arginyl-l-tryptophyl-glycine, which corresponded to the amino acid sequences of positions 6–9, 6–10 and 5–10, respectively, of the corticotropin and α-MSH molecules, has been described. 2) The synthetic procedure for γ-t-butyl-l-glutamyl-l-histidyl-l-phenylalanlyl-l-arginyl-l-tryptophyl-glycine, a key intermediate to the higher peptides eliciting the adrenocorticotropic activity, has been improved. 3) An active ester Nα, NIm-dicarbobenzoxy-l-histidine p-nitrophenyl ester has been found to be of value for the synthesis of histidyl peptides. 4) An effective use of partition chromatography on a Sephadex column for purification of peptides has been cited.

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