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。
Minimization of Back‐Electron Transfer Enables the Elusive sp
<sup>3</sup>
C−H Functionalization of Secondary Anilines
作者:Huaibo Zhao、Daniele Leonori
DOI:10.1002/anie.202100051
日期:2021.3.29
Anilines are some of the most used class of substrates for application in photoinduced electron transfer. N,N‐Dialkyl‐derivatives enable radicalgenerationα to the N‐atom by oxidation followed by deprotonation. This approach is however elusive to monosubstituted anilines owing to fast back‐electron transfer (BET). Here we demonstrate that BET can be minimised by using photoredox catalysis in the presence
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
Cyanomethylation of imines enabled by a mild deprotonation of acetonitrile using a combination of TMSCF3 and CsF
作者:Jie Tong、Jiaheng Li、Juncheng Li、Savia L. Boyer、Ting Wang
DOI:10.1016/j.tetlet.2024.154937
日期:2024.5
biology. Herein we reported a method to synthesize -amino nitriles, the crucial synthetic precursor to -amino acids. By using a nucleophilic base-complex, generated from TMSCF and CsF, addition of acetonitrile to a series of aromatic imines offered the corresponding -amino nitriles in excellent yields. Moreover, other electron withdrawing group bearing methyl group could be deprotonated to produce a good
The first transition-metal-free addition of alkyl nitriles to unactivated irnines was developed using a catalytic combination of 4-MeOC6H4CNa and TMSCH2CO2Et to promote the reaction. The corresponding beta-amino nitriles are obtained in good to almost quantitative isolated yields under mild conditions. A mechanism involving an autocatalytic pathway is proposed on the basis of experimental observations.