化学
烷基化
钌
亚甲基
催化作用
乙腈
产量(工程)
配体(生物化学)
组合化学
卡宾
有机化学
药物化学
生物化学
受体
冶金
材料科学
作者
Zakaria Moutaoukil,Emmanuel Serrano-Diez,Isidro G. Collado,Manuel J. Tenorio,José Manuel Botubol-Ares
摘要
An efficient ruthenium-catalyzed N-alkylation of amines, amides and sulfonamides has been developed employing novel pentamethylcyclopentadienylruthenium(II) complexes bearing the methylene linked bis(NHC) ligand bis(3-methylimidazol-2-ylidene)methane. The acetonitrile complex 2 has proven particularly effective with a broad range of substrates with low catalyst loading (0.1-2.5 mol%) and high functional group tolerance under mild conditions. A total of 52 N-alkylated organonitrogen compounds including biologically relevant scaffolds were synthesized from (hetero)aromatic and aliphatic amines, amides and sulfonamides using alcohols or diols as alkylating agents in up to 99% isolated yield, even on gram-scale reactions. In the case of sulfonamides, it is the first example of N-alkylation employing a transition-metal complex bearing NHC ligands.
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