Synthesis of Selectively Mono-N-Arylated Aliphatic Diamines<i>via</i>Iridium-Catalyzed Amine Alkylation
作者:Benoît Blank、Stefan Michlik、Rhett Kempe
DOI:10.1002/adsc.200900548
日期:2009.11
A highly selective phosphorus/nitrogen (P,N) ligand-based iridium catalyst system efficiently catalyzes the reaction of arylamines with unprotected amino alcohols, yielding N-arylated aliphatic diamines in yields of up to 93%. The reaction can be performed with a wide variety of branched and linear amino alcohols in combination with various aminopyridines or substituted anilines.
A readily available pincer ruthenium(II) complex catalyzes the selective monoalkylation of (hetero)aromaticamines with a wide range of primaryalcohols (including pyridine-, furan-, and thiophene-substituted alcohols) with high efficiency when used in low catalyst loadings (1 mol %). Tertiary amine formation via polyalkylation does not occur, making this ruthenium system an excellent catalyst for