Elimination–addition. Part XVI. Elimination in 2-sulphonylethyl carboxylates: a method for the protection of carboxy-groups in peptide synthesis
作者:A. W. Miller、C. J. M. Stirling
DOI:10.1039/j39680002612
日期:——
reaction provides the basis of a method for the protection of carboxy-groups during peptide synthesis. The sequence involves formation of 2-toluene-p-sulphonylethyl esters of amino-acids or peptides which are then coupled with N-protected amino-acids to give fully protected peptides. These, on mild treatment with bases, liberate N-protected peptides. 2-Toluene-p-sulphonylethyl esters are stable under
在弱碱性条件下,可从羧酸的2-磺酰基乙基酯迅速消除羧酸根离子。该反应提供了在肽合成过程中保护羧基的方法的基础。该序列涉及氨基酸或肽的2-甲苯-对-磺酰基乙基酯的形成,然后将其与N-保护的氨基酸偶联以得到完全保护的肽。在用碱温和处理时,它们释放出N-保护的肽。2-甲苯-对-磺酰基乙基酯在用于通过混合碳酸酐,对-硝基苯基酯和二环己基碳二亚胺方法偶联的条件下是稳定的。