The synthesis of Fmoc-aminoacyl-N-ethyl-S-triphenylmethylcysteine, an N- to S-acyl migratory device for the preparation of peptide thioesters by Fmoc-SPPS (solid-phase peptide synthesis) is described. Condensation of Fmoc-aminoacyl pentafluorophenyl ester and N-ethyl-S-triphenylmethylcysteine was efficiently performed in the presence of HOOBt (3-hydroxy-3,4-dihydro-4-oxo-1,2,3-benzotriazine) in DMF. A small amount of diastereomer yielded during the reaction was easily separated by HPLC purification and the highly pure devices were obtained for most of the proteinogenic amino acids.
描述了Fmoc-
氨酰-N-乙基-S-三苯基甲基半胱
氨酸的合成,这是一种用于通过Fmoc-
SPPS(固相肽合成)制备肽
硫酯的N至S-酰基迁移装置。在
DMF中,在
HOOBt(3-羟基-3,4-二氢-4-氧代-1,2,3-苯并
三氮唑)的存在下,Fmoc-
氨酰
五氟苯基酯与N-乙基-S-三苯基甲基半胱
氨酸的缩合反应有效进行。在反应过程中产生的小量非对映体可以通过HPLC纯化轻松分离,绝大多数蛋白源
氨基酸获得了高纯度的迁移装置。