作者:Nico Kotzur、Benoît Briand、Michael Beyermann、Volker Hagen
DOI:10.1021/ja907287n
日期:2009.11.25
water-soluble photolabile protecting groups for thiols based on 2-nitrobenzyl and (coumarin-4-yl)methyl chromophores, among them two new ones. The protecting groups allow, due to their different absorption maxima, wavelength-selective photocleavage of binary mixtures of cysteine derivatives protected at the thiol function with various photolabile protecting groups by irradiation with light. The concept
我们开发并表征了基于 2-硝基苄基和 (香豆素-4-基) 甲基发色团的硫醇的高效、显着水溶性光不稳定保护基团,其中有两个新的。由于其不同的吸收最大值,保护基团允许在硫醇官能团处保护的半胱氨酸衍生物的二元混合物通过光照射进行波长选择性光裂解。该概念也适用于模型肽反应衍生物中两个不同的 S 保护的半胱氨酸残基。肽 Ac(0)-Cys(1)(BCMACMOC),Cys(8)(7,8BCMCMOC)-resact 和 Ac(0)-Cys(1)(C4MNB),Cys(8) 可以实现选择性光解(BCMACMOC)-通过分别用 > 或 = 402 nm 或 > 或 = 436 nm 波长的光照射发生反应,然后在 λ 下照射 >