Carbocations in Action. Design, Synthesis, and Evaluation of a Highly Acid-Sensitive Naphthalene-Based Backbone Amide Linker for Solid-Phase Synthesis
作者:Michael Pittelkow、Ulrik Boas、Jørn B. Christensen
DOI:10.1021/ol062410j
日期:2006.12.1
based on a regiospecifically substituted tetraalkoxy naphthaldehyde core are presented. This handle enables cleavage of peptide backbone amides (secondary amides) off a solid support using as little as 0.5% TFA in CH2Cl2. This proceeds without cleavage of tert-butyl ethers and tert-butyl esters. The design is based on a DFT study that predicted the most stabile alkoxy-substituted methyl naphthyl carbocation
提出了一种基于区域特异性取代的四烷氧基萘甲醛核心的对酸非常不稳定的骨架酰胺连接基的设计,合成和性能。使用低浓度的CH2Cl2中的TFA,该手柄可将肽主链酰胺(仲酰胺)从固体支持物上裂解下来。进行该过程时不会裂解叔丁基醚和叔丁基酯。该设计基于DFT研究,该研究预测了最稳定的烷氧基取代的甲基萘基碳正离子化。[结构:见文字]