Application of t-butyldimethylsilyl ethers of serine, threonine and tyrosine in peptide syntheshsis
摘要:
The utility of Tbdms (t-butyldimethylsilyl) ethers, prepared conveniently in a one-pot procedure from N(alpha)-Fmoc (9-fluorenylmethoxycarbonyl) and N(alpha)-Z (benzyloxycarbonyl) hydroxyamino acids, is demonstrated: peptide bond formation and esterification to 4-alkoxybenzylalcohol resin are achieved readily with these derivatives. The lability of the Tbdms ethers to various reagents enables selective deprotection of the hydroxyl side-chains after peptide chain assembly, desirable, e.g., for phosphorylation or glycosilation.
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