Atom-Economical Synthesis of 2-Aminoimidazoles via [3+2] Annulation Catalyzed by Titanacarborane Monoamide
作者:Zuowei Xie、Yang Wang、Hao Shen
DOI:10.1055/s-0030-1259713
日期:2011.4
An atom-economical synthesis of 2-aminoimidazoles catalyzed by a titanacarborane monoamide is reported. Reactions of propargylamines with carbodiimides, in the presence of 5 mol% [Ï:η ¹:η 5-(OCH2)(Me2NCH2)C2B9H9]Ti(NMe2), afford a new class of substituted 2-aminoimidazoles via [3+2] annulation in good to excellent yields. A possible reaction mechanism is proposed.