Analogs of enkephalin having agonist activity at opiate receptors are disclosed herein. These analogs are useful as analgesics, non-addicting narcotic antagonists and anti-diarrheal agents.
Facile synthesis of amino acid and peptide esters under mild conditions via cesium salts
作者:Su-Sun Wang、B. F. Gisin、D. P. Winter、R. Makofske、I. D. Kulesha、C. Tzougraki、J. Meienhofer
DOI:10.1021/jo00428a004
日期:1977.4
Synthesis of Met-enkephalin by solution-phase peptide synthesis methodology utilizing<i>para</i>-toluene sulfonic acid as N-terminal masking of<scp>l</scp>-methionine amino acid
作者:Riaz A. Khan
DOI:10.1111/cbdd.12821
日期:2016.12
solution‐phase synthesis (SPS) methodology employing ‐OBzl group as carboxyls' protection, while the t‐Boc groups were employed for the N‐terminal α‐amines' protection for the majority of the aminoacids of the pentapeptide sequence. The l‐methionine (l‐Met) aminoacid was used as PTSA.Met‐OBzl obtained from the simultaneous protection of the α‐amino, and carboxyl group with para‐toluene sulfonic acid (PTSA)