[reaction: see text] The removal of electroauxiliaries from peptide substrates with chemical oxidants has been examined as a method for inserting N-acyliminium ions into the peptides. To this end, it was found that both 4-methoxyphenyldimethylsilyl and 2,4-dimethoxyphenyldimethylsilyl electroauxiliaries were readily cleaved with the use of ceric ammonium nitrate. Of the two groups, the 2,4-dimetho
[反应:见正文]作为将N-酰基
亚胺离子插入肽中的方法,已经研究了用
化学氧化剂从肽底物上去除电助剂的方法。为此,发现使用
硝酸铈铵可容易地裂解4-
甲氧基苯基二甲基甲
硅烷基和2,4-二
甲氧基苯基二甲基甲
硅烷基电助剂。在两组中,2,4-二
甲氧基苯基二甲基甲
硅烷基电助剂在氧化条件下最不稳定。氧化反应被证明与固相底物的使用相容。