Synthesis of Methionine ContainingPeptides Related to Native Chemical Ligation
作者:Richard R. Schmidt、Kandasamy Pachamuthu
DOI:10.1055/s-2003-38361
日期:——
Methionine chemical ligation is based on a convenient direct thioester formation at the C-terminus of the ligation site, on homocysteine reduction with dithiothreitol in order to liberate the mercapto group of the homocysteine residue at the N-terminus, and on chemoselective S-methylation with methyl iodide.
蛋氨酸化学连接的基础是:在连接位点的 C 端直接形成方便的硫代酯;用二硫苏糖醇还原同型半胱氨酸,以释放 N 端同型半胱氨酸残基的巯基;以及用甲基碘进行化学选择性 S 甲基化。
Kasafirek, Evzen; Fukal, Ladislav; Kas, Jan, Collection of Czechoslovak Chemical Communications, 1988, vol. 53, # 12, p. 3197 - 3205
A Lewis-acid-catalyzed method for the substrate-directed formation of peptide bonds has been developed, and this powerful approach is utilized for the new "remote" activation of carboxyl groups under solvent-free conditions. The presented method has the following advantages: 1) the high-yielding peptidesynthesis uses a tantalum catalyst for any amino acids; 2) the reaction proceeds without any racemization;