Nv. Heeb et al., SYNTHESIS OF ENANTIOMERICALLY PURE MOC-S-MOB-(S)-ALPHA-AMINO-EPSILON-MERCAPTOHEXANOIC ACID AND ITS USE IN SOLID-PHASE PEPTIDE-SYNTHESIS, Tetrahedron letters, 35(15), 1994, pp. 2287-2290
Enantiomerically pure N-Fmoc-S-Mob (S)-alpha-amino-epsilon-mercaptohex
anoic acid (Amh) was synthesized in an efficient three step process fr
om (L)-lysine via nucleophilic displacement of the pyridinium salt. An
efficient method for Fmoc protection without any racemization is desc
ribed. Incorporation of this unnatural amino acid into peptides and it
s complete deprotection was accomplished in high yield using standard
procedures.