A carbamoyl-protective group for tyrosine that facilitates purification of hydrophobic synthetic peptides
作者:Karolina Wahlström、Ove Planstedt、Anders Undén
DOI:10.1016/j.tetlet.2008.04.014
日期:2008.6
arbamoyl group (Boc-Nmec) is reported as a new side chain-protective group for tyrosine in Fmoc solid-phase peptide synthesis. Tyrosine is incorporated into the peptide as Fmoc-Tyr(Boc-Nmec)-OH by standard coupling methods. During the cleavage of the peptide from the resin with TFA the Boc group is simultaneously cleaved while the cationic N-methyl-N-[2-(methylamino)ethyl]carbamoyl group remains attached
经Boc Ñ甲基ñ - [2-(甲基氨基)乙基]氨基甲酰基(BOC-Nmec)被报告为用于Fmoc固相肽合成酪氨酸新侧链保护基。通过标准偶联方法将酪氨酸作为Fmoc-Tyr(Boc-Nmec)-OH掺入肽中。在用TFA从树脂上裂解肽的过程中,同时裂解了Boc基团,而阳离子N-甲基-N- [2-(甲基氨基)乙基]氨基甲酰基仍与酪氨酸残基连接,从而增加了肽的溶解度。纯化肽后,可以通过分子内环化反应在中性或弱碱性条件下裂解Nmec保护基。