Convenient Synthesis of <i>N</i>-Methylamino Acids Compatible with Fmoc Solid-Phase Peptide Synthesis
作者:Eric Biron、Horst Kessler
DOI:10.1021/jo050477z
日期:2005.6.1
Unfortunately, their synthesis is hampered by the high price and unavaibility of many Nα-methylamino acids. An efficient and practical preparation of Nα-methyl-Nα-(o-nitrobenzenesulfonyl)-α-amino acids without extensive purification is described. The procedure is based on the well-known N-alkylation of Nα-arylsulfonylamino esters which was improved by using dimethyl sulfate and DBU as base. Ester cleavage is
Ñ α含甲基氨基酸肽表现出有趣的治疗概况和正日益被视为潜在的有用的治疗剂。不幸的是,它们的合成是由高价格和unavaibility的许多阻碍Ñ α甲基氨基酸。的有效且实用的制备Ñ α甲基ñ α - (ö -nitrobenzenesulfonyl)-α-氨基而不需要大量纯化的酸进行说明。该程序是基于公知的Ñ的烷基化Ñ α通过使用硫酸二甲酯和DBU作为碱改进的-芳基磺酰基氨基酯。酯裂解被有效地用S来实现Ñ与碘化锂2型皂化,避免与氢氧化锂水解观察到消旋。的合成的兼容性Ñ α甲基氨基羧酸与Fmoc固相肽合成是通过使用正常的偶合条件,以有效地制备证明ñ -甲基的二肽。所描述的过程允许制备Ñ α甲基氨基酸中的时间很短的时间和的快速合成Ñ使用Fmoc的固相肽合成-甲基肽。