Amino acids having masked amino groups react with amino acids having masked carboxyl groups to form peptide derivatives in good yields if the reaction medium contains an isonitrile. Isonitriles also are effective in causing condensation of amino acids having masked amino groups with compounds having active hydroxyl groups to the corresponding amino acid esters. The yields of the first-mentioned reaction are enhanced if the reaction mixture additionally contains one of the compounds having active hydroxyl groups. Both the peptide derivatives and the amino acid esters of the compounds having active hydroxyl groups are useful for peptide synthesis.
具有掩蔽
氨基的
氨基酸与具有掩蔽羧基的
氨基酸在含有异腈的反应介质中反应,可以高产率地形成肽衍
生物。异腈还能有效地导致具有掩蔽
氨基的
氨基酸与具有活性羟基的化合物发生缩合反应,形成相应的
氨基酸酯。如果反应混合物中另外含有一种具有活性羟基的化合物,则第一种反应的产率会提高。这些肽衍
生物和具有活性羟基化合物的
氨基酸酯对肽合成非常有用。