Synthesis of protected ω-mercapto amino acids: precursors for incorporation of elongated cysteines into peptides
摘要:
A series of protected omega-mercapto amino acids with side-chain lengths ranging from 3-5 methylene units has been synthesized via nucleophilic substitution of omega-bromo-alpha-azido acids by 4-methoxy-alpha-toluenethiol followed by reduction of the azido functionality with SnCl2. These enantiomerically pure protected cysteine analogues can be used to optimize the length of disulfide connections in cyclically constrained peptide pharmacophores. (C) 1998 Elsevier Science Ltd. All rights reserved.
Synthesis of protected ω-mercapto amino acids: precursors for incorporation of elongated cysteines into peptides
摘要:
A series of protected omega-mercapto amino acids with side-chain lengths ranging from 3-5 methylene units has been synthesized via nucleophilic substitution of omega-bromo-alpha-azido acids by 4-methoxy-alpha-toluenethiol followed by reduction of the azido functionality with SnCl2. These enantiomerically pure protected cysteine analogues can be used to optimize the length of disulfide connections in cyclically constrained peptide pharmacophores. (C) 1998 Elsevier Science Ltd. All rights reserved.