β-氨基腈是重要的分子支架。亚胺的氰烷基化是构建这些支架的最直接的方法。在这项研究中,我们报道了通过光敏电子供体-受体复合物实现的自由基偶联实现亚胺的新型氰烷基化。该策略具有条件温和、反应范围广、原子经济性高等特点。该策略的可扩展性和实用性通过 40 g 连续流动系统得到了证明,从中获得了多种重要的药物相关分子。
Electrochemical radical–radical cross-coupling: direct access to β-amino nitriles from unactivated imines and alkyl nitriles
作者:Wei-Mei Zeng、Zhi-Lv Wang、Yan-Hong He、Zhi Guan
DOI:10.1039/d2gc00457g
日期:——
nitriles from unactivated imines and alkyl nitriles by electrochemical radical–radical cross-coupling was described for the first time. The use of abundant and inexpensive alkyl nitriles without pre-functionalization for the reductive cyanoalkylation of imines makes the reaction atom- and step-economical. This synthetic strategy provides a green, mild and efficientmethod for the construction of β-amino
Elektrokatalytische Cyanomethylierung von Azomethinen: Eine neue Synthese f�r ?-Aminonitrile
作者:U. Hess、A.-K. Raasch、M. Schulze
DOI:10.1002/prac.19923340607
日期:——
Certain Schiff-bases (2 - 7) react in acetonitrile (1) at a Hg-cathode in a new electrocatalyzed cyanomethylation method in good yields without side-products to beta-aminonitriles (2a - 7a). The synthesis is initiated by an electrochemical deprotonation of 1 by azomethine-radical anions in catalytical amount to acetonitril anions (B-). During nucleophilic reaction of B- with 2 - 7 up to its complete consumption, the cyanomethylation synthon B- is regenerated in a cyclic, self-reproducing process. Quantum chemical calculation in context with cyanomethylation product analysis permit mechanistical insights and exact prediction of suitable azomethines and coupling position for B-.