Studies on Encephalitogenic Fragments of Myelin Protein. II. Solid Phase Synthesis of Tryptophan-containing Decapeptide
作者:KENJI SUZUKI、YUSUKE SASAKI
DOI:10.1248/cpb.21.2634
日期:——
Solid phase synthesis of H-Arg-Phe-Ser-Trp-Gly-Ala-Glu-Gly-Gln-Arg-OH was accomplished by two different approaches, stepwise chain elongation and fragment condensation. Two fragments, Boc-Ala-Glu (OBzl)-Gly-OH (II) and Boc-Phe-Ser-Trp-Gly-OH (IV), were used for fragment condensation. Overall yields of the decapeptide were 10% in stepwise chain elongation and 34% in fragment condensation respectively. A failure pentapeptide, H-Phe-Ser-Trp-Gly-Arg-OH, was isolated in the two procedures.
H-Arg-Phe-Ser-Trp-Gly-Ala-Glu-Gly-Gln-Arg-OH 的固相合成采用了两种不同的方法:分步链延长和片段缩合。Boc-Ala-Glu (OBzl)-Gly-OH (II) 和 Boc-Phe-Ser-Trp-Gly-OH (IV) 这两个片段被用于片段缩合。十肽的总产率分别为逐步延链法的 10%和片段缩合法的 34%。两种方法都分离出了一个失败的五肽 H-Phe-Ser-Trp-Gly-Arg-OH。