Novel acylation catalysts in peptide synthesis: derivatives of N-hydroxytriazoles and N-hydroxytetrazoles
作者:Jane C. Spetzler、Morten Meldal、Jakob Felding、Per Vedsø、Mikael Begtrup
DOI:10.1039/a707313e
日期:——
the following) and N-hydroxytetrazole have been evaluated in a direct competition assay to investigate their efficiency as catalysts in the formation of peptide bonds. Furthermore, three well known catalysts, 1-hydroxy-7-azabenzotriazole (HOAt), 3,4-dihydro-3-hydroxy-4-oxo-1,2,3-benzotriazine (Dhbt-OH) and 1-hydroxybenzotriazole (HOBt) have been compared. All nine compounds have been used for activation
1-羟基-1,2,3-三唑(以下称1-羟基三唑)和N-羟基四唑的六种新衍生物已在直接竞争试验中得到评估,以研究它们在形成肽键中作为催化剂的效率。此外,三种众所周知的催化剂,1-羟基-7-氮杂苯并三唑(HOAt),3,4-二氢-3-羟基-4-氧代-1,2,3-苯并三嗪(Dhbt-OH)和1-羟基苯并三唑(HOBt) )进行了比较。所有九种化合物已与N,N一起用于活化使用芴9-基甲氧基羰基(Fmoc)策略进行固相合成中的'-二异丙基碳二亚胺(DIPCDI)。还已经分析了催化剂抑制外消旋的能力。结果表明,三种新化合物在抑制外消旋作用方面与HOAt和HOBt竞争。发现5-氯-1-羟基三唑是高效的酰化催化剂。但是,它没有显示出对消旋作用的充分抑制。它在合成含有Aib–Aib的肽方面的催化作用优于HOAt。同样,2-羟基四唑具有优于HOAt的催化效率,并且与HOBt一样有效地抑制了外消旋化。羟四唑在锤