Studies on peptides. CXXI. Nin-Mesitylenesulfonyltryptophan, a new derivative for peptide synthesis.
作者:NOBUTAKA FUJII、SHIROH FUTAKI、KOICHI YASUMURA、HARUAKI YAJIMA
DOI:10.1248/cpb.32.2660
日期:——
The mesitylenesulfonyl (Mts) group was introduced at the Nin of tryptophan by Illi's method. This group is stable under various conditions required for practical peptide synthesis, such as treatments with dil. alkali, hydrazine hydrate, TFA and even 4 N HCl-dioxane or 25% HBr-AcOH. HF is not able to remove this protecting group, but it can be smoothly cleaved by 1 M trifluoromethanesulfonic acid/TFA or methanesulfonic acid. The usefulness of this new tryptophan derivative, Trp (Mts), for practical peptide synthesis was demonstrated by the synthesis of cholecystokinin-heptapeptide as an example.
Mts(美克苯磺酰)基团通过Illi的方法引入到色氨酸的N位置。该基团在实际肽合成所需的各种条件下都具有稳定性,例如与稀碱、肼水合物、TFA,甚至4 N HCl-二氧六环或25% HBr-乙酸的处理。HF无法去除该保护基团,但可以通过1 M 三氟甲烷磺酸/TFA或甲烷磺酸顺利断裂。新型色氨酸衍生物Trp(Mts)在实际肽合成中的实用性通过以合成胆囊收缩素七肽为例得到了证明。