Imine or Enamine? Insights and Predictive Guidelines from the Electronic Effect of Substituents in H-Bonded Salicylimines
作者:R. Fernando Martínez、Esther Matamoros、Pedro Cintas、Juan C. Palacios
DOI:10.1021/acs.joc.0c00130
日期:2020.5.1
Imine and enamine bonds decorate the skeleton of numerous reagents, catalysts, and organic materials. However, it is difficult to isolate at will a single tautomer, as dynamic equilibria occur easily, even in the solid state, and are sensitive to electronic and steric effect, including π-conjugation and H-bonding. Here, using as model Schiff bases generated from salicylaldehydes and TRIS in a set of
亚胺键和烯胺键修饰了许多试剂,催化剂和有机材料的骨架。但是,很难随意分离出一个互变异构体,因为即使在固态下也容易发生动态平衡,并且对电子和空间效应(包括π共轭和H键)敏感。在此,我们以水杨醛和TRIS生成的席夫碱为模型,以一组线性自由能关系(LFER)为基础,我们揭示了如何控制亚胺或烯胺的形成,并提供了一个全面的框架来捕获这一预测的结构基础。这项工作突显了定制设计在向具有所需功能的化合物的途中的潜力。