A new synthetic approach toward direct CâN bond formation through sp3 CâH activation has been developed under metal-free conditions. Both primary and secondary benzylic CâH substrates could react smoothly with various amines to give only mono-amination products with good to excellent yields.
TBHP/I2-Promoted Oxidative Coupling of Azoles with Benzyl Compounds via Cleavage of Nonactivated C(sp3)-H Bonds under Solvent-Free Conditions
作者:Baohua Chen、Xiang Liu、Guiqin Yu、Jihui Li、Dong Wang、Yongxin Chen、Keqin Shi
DOI:10.1055/s-0033-1338871
日期:——
A novel and efficient TBHP/I 2 -promoted oxidative coupling of azoles with benzyl compounds via cleavage of nonactivated C(sp 3 )–H bonds under metal-free, base-free, and solvent-free conditions for the synthesis of N-alkylated azoles has been developed. The procedure, using I 2 as the catalyst, is a simple, economical, and environmentally friendly protocol, which could be applied to various available
The heterocyclic ionic liquid-catalyzed direct oxidative amination of benzylic sp3 C–H bonds via intermolecular sp3 C–N bond formation for the synthesis of N-alkylated azoles under metal-free conditions is reported for the first time. The catalyst 1-butylpyridinium iodide can be recycled and reused with similar efficacies for at least eight cycles.