Formation and decomposition of N-alkylnaphthalimides: experimental evidences and ab initio description of the reaction pathways
作者:Teresa Cristina de Barros、Pedro Berci Filho、Michel Loos、Mario José Politi、Hernan Chaimovich、Iolanda Midea Cuccovia
DOI:10.1002/poc.1768
日期:2011.5
The kinetics of hydrolysis of 1,8‐N‐butyl‐naphthalimide (1,8‐NBN) to 1,8‐N‐butyl‐naphthalamide (1,8‐NBAmide) and of 2,3‐N‐butyl‐naphthalimide (2,3‐NBN) to 2,3‐N‐butyl‐naphthalamide (2,3‐NBAmide), as well as the formation of the respective anhydrides from the amides were investigated in a wide acidity range. 1,8‐NBN equilibrates with 1,8‐NBAmide in mild alkali. Under the same conditions 2,3‐NBN quantitatively
1,8- N-丁基-萘二甲酰亚胺(1,8-NBN)水解为1,8 - N-丁基-萘二甲酰胺(1,8-NBAmide)和2,3 - N - N-丁基-萘二甲酰亚胺( 2,3-NBN)至2,3- N-丁基萘二甲酰胺(2,3-NBAmide)以及由酰胺在较宽的酸度范围内形成相应酸酐的方法进行了研究。1,8-NBN与1,8-NBAmide在弱碱中平衡。在相同条件下2,3-NBN定量生成2,3-NBAmide。1,8-和2,3- N的反应在很宽的酸度范围内丁基萘二甲酰胺(或酰亚胺)可产生相似的产物,但速率和pH值差异很大。在1,8-NBAmide中证明了在酸中形成酸酐。在从头算的多种途径中使反应机理合理化。1,8-和2,3 - N-丁基萘二甲酰胺的反应速率和pH范围的差异归因于四面体中间体在碱中的稳定性以及五种和六种中间体的相对稳定性元环中间体。羧酸辅助的1,8 - N-丁基-萘二甲酰胺水解速率是描述