[reaction in text] A thiol linker-attached peptide was prepared from a nonprotected peptide via an N(alpha)()-alpha-oxoacyl peptide. Selective oxidation of the N-terminal serine with sodium periodate gave the N(alpha)-glyoxyloyl peptide, reductive amination of which with 4,5-dimethoxy-2-(triphenylmethylthio)benzylamine gave an N(alpha)-4,5-dimethoxy-2-mercaptobenzyl glycyl peptide after removal of
[本文中的反应]由未保护的肽通过Nα()-α-氧代酰基肽制备与
硫醇连接子相连的肽。用
高碘酸钠选择性氧化N端
丝氨酸,得到N-α-
乙醛酰肽,用4,5-二甲氧基-2-(三苯基甲
硫基)
苄胺还原胺化得到Nα-4,5-二甲氧基除去三苯甲基后的-2-巯基苄基
缩水甘油基肽。Nα-4,5-二甲氧基-2-巯基苄基肽可以与肽
硫酯缩合,并且连接基是可除去的。该策略提供了使用
重组蛋白合成肽的有用方法。