Electroreductive Coupling of Phthalimides with α,β-Unsaturated Carbonyl Compounds and Subsequent Acid-Catalyzed Rearrangement to 4-Aminonaphthalen-1-ols: Density Functional Theory Study of the Acid-Catalyzed Rearrangement of Ketene Silyl Acetals
作者:Naoki Kise、Tatsuhiro Manto、Toshihiko Sakurai
DOI:10.1021/acs.joc.1c02512
日期:2021.12.17
The electroreductive coupling of phthalimides with α,β-unsaturated carbonyl compounds in the presence of TMSCl and successive treatment of the electrochemically coupled products with TFA gave two types of rearranged products, 3- and 2-substituted 4-aminonaphthalen-1-ols. The substituent (R) on the nitrogen atom of phthalimides determined which type of 4-aminonaphthalen-1-ol was preferentially formed
在 TMSCl 存在下,邻苯二甲酰亚胺与 α,β-不饱和羰基化合物的电还原偶联,以及用 TFA 对电化学偶联产物的连续处理,得到了两种类型的重排产物,3-和 2-取代的 4-氨基萘-1-醇。邻苯二甲酰亚胺氮原子上的取代基 (R) 决定了优先形成哪种类型的 4-氨基萘-1-醇。体积较大和体积较小的 N 取代基分别选择性地提供 3-和 2-取代的 4-氨基萘-1-醇。通过密度泛函理论计算,通过电还原偶联产生的甲硅烷基乙烯酮缩醛酸催化重排,推测重排产物的选择性取决于甲硅烷基乙烯酮缩醛的酰胺基团的 O 或 N 质子化是否发生得更快。