Wavelength-selective cleavage of o-nitrobenzyl and polyheteroaromatic benzyl protecting groups
作者:Ana M. Piloto、Susana P.G. Costa、M. Sameiro T. Gonçalves
DOI:10.1016/j.tet.2013.11.100
日期:2014.1
Evaluation of the wavelength-selective cleavage of five photolabile protecting groups from two different families has been performed. Alanine, as a model bifunctional target molecule was masked at the amino terminal with o-nitrobenzyl group and at the carboxylic terminal with benzyl-type nitrogen and oxygen polyheteroaromatics, namely acridine, (thioxo)benzocoumarin and a coumarin built on the julolidine
已经对来自两个不同家族的五个光不稳定保护基团的波长选择性裂解进行了评估。作为模型双功能靶分子的丙氨酸在氨基末端被邻硝基苄基掩蔽,在羧基末端被苄基型氮和氧多杂芳族化合物,即a啶,(硫代)苯并香豆素和构建在聚ul啶核上的香豆素掩蔽。在选定的波长下,通过HPLC / UV和1 H NMR监测研究了相应丙氨酸缀合物的光敏性。完全脱保护的分子的释放可以通过在可变的照射时间内进行连续照射来实现,这取决于所使用的杂芳族基团。