Photochemically Removable Protecting Groups Based on Covalently Linked Electron Donor−Acceptor Systems
作者:Kwangjoo Lee、Daniel E. Falvey
DOI:10.1021/ja9939441
日期:2000.10.1
Photoremovable protecting groups based on intramolecular electron transfer have been synthesized and studied. One molecule contains a N,N-dimethylaniline chromophore covalently linked to a phenacyl ester of acetic acid. UV photolysis of this molecule results in the release of acetic acid. Laser flash photolysis experiments show that photolysis creates an intramolecular charge-transfer state that has a
已经合成和研究了基于分子内电子转移的可光去除保护基团。一个分子含有与乙酸苯甲酰酯共价连接的 N,N-二甲基苯胺发色团。该分子的紫外线光解导致醋酸的释放。激光闪光光解实验表明,光解会产生分子内电荷转移状态,其寿命约为 500 ns。这种电荷转移状态在导致乙酸消除的断键途径和导致回到基态反应物的电荷重组途径之间划分。还合成了使用蒽发色团的类似系统。这在紫外线光解时不会释放羧酸。反而,