An Ir-catalyzed tandem synthesis of various N-methylated tertiaryamines from three-component coupling of carbonyl compounds, amines, and methanol following reductive amination/N-methylation is reported for the first time. A wide array of substrates with tolerance of different functional groups was demonstrated. The protocol was extended to the synthesis of N-methyl containing pharmaceutically important
首次报道了还原胺化/ N-甲基化后由羰基化合物、胺和甲醇的三组分偶联合成各种N-甲基化叔胺的 Ir 催化串联合成。展示了具有不同官能团耐受性的多种底物。该方案扩展到合成含有N-甲基的药学上重要的药物分子。基于各种控制实验和不同的分析技术(如 NMR、IR 和 ESI-MS)提出了可能的催化循环。
Solid-phase synthesis of tertiary methylamines via reductive alkylation–fragmentation using a hydroxylamine linker
The solid-phase synthesis of tertiary methylamines via reductive alkylation-fragmentation employing a hydroxylamine linker is described. The hydroxylamine linker is traceless, robust and versatile, allowing strong organometallic reagents to be used in the synthesis of diverse tertiary methylamines. (C) 2000 Elsevier Science Ltd. All rights reserved.