A metal-free protocol of direct C(sp3)–H cyanation with cyanobenziodoxolones functioning as both cyanating reagents and oxidants was developed. Unactivated substrates, such as alkanes, ethers and tertiary amines, were thereby transformed to the corresponding nitriles in moderate to high yields. Mechanistic studies indicated that the cyanation proceeded with two potential pathways, which is highly dependent
Copper-catalyzed synthesis of α-amino nitriles through methyl transfer from DMF to aromatic amines
作者:Zaifeng Yuan、Na Li、Chunyu Zhu、Chengfeng Xia
DOI:10.1039/c8cc00485d
日期:——
A copper-catalyzed activation of C(sp3)–H bonds of DMF at room temperature was developed, which results in methyl transfer to aromatic amines for efficient synthesis of exceedingly valuable α-amino nitriles. This process features excellent functional group tolerance, a broad substrate scope, and high activity under ambient conditions.
Highly efficient and recyclable magnetic nanoparticles-supported gold(III)-bipy catalyst for oxidative α-cyanation of tertiary amines
作者:Weisen Yang、Li Wei、Feiyan Yi、Mingzhong Cai
DOI:10.1016/j.tet.2016.05.037
日期:2016.7
tertiary amines with trimethylsilyl cyanide was achieved by using a magnetic nanoparticles-supported gold(III)-bipy complex as catalyst to afford the corresponding α-aminonitriles in good to excellent yields in the presence of tert-butyl hydroperoxide under acid-free conditions. The new heterogeneous goldcatalyst can easily be separated from the reaction mixture by using an external magnet and can be recycled
A Highly Efficient Heterogeneous Ruthenium-Catalysed Oxidative α-Cyanation of Tertiary Amines Leading to α-Aminonitriles
作者:Xiaoming Wang、Ruian Xiao、Jingting Ai、Mingzhong Cai
DOI:10.3184/174751917x15064232103065
日期:2017.10
Oxidative α-cyanation of tertiaryamines was achieved by using an MCM-41-immobilised N-alkylethylenediamine ruthenium(III) complex (MCM-41-2N-RuCl3) as catalyst in MeOH at 60 °C in the presence of H2O2 as oxidant and NaCN in acetic acid as a cyanide source to afford the corresponding α-aminonitriles in good yields. The new heterogeneous ruthenium catalyst can easily be prepared by a simple two-step