Peptide synthesis. Part 4. Solid-phase syntheses of peptides related to gastrin

Abstract

Details are given of the synthesis of the tetradecapeptide amide [12-leucine]human minigastrin I and its des-1-tryptophan analogue using solid-phase methods based on polar polydimethylacrylamide supports. Exposure to acidic reagents during the synthesis was minimised by use of N_α-fluorenylmethoxycarbonyl-amino-acids and t-butyl-based side-chain protecting groups. High yields of readily purified minigastrin analogues were obtained showing the full biological activity of the natural hormone.