Easily obtained 1-methyl-2-(1′-hydroxyalkyl)-1H-imidazoles (4) were found to be a new type of masked form for carbonyl group which could survive under various severe conditions. The corresponding carbonyl compounds (3) were easily reproduced by quarternization of the imidazole (4) with CH3I followed by aqueous basic treatment. 2-Acyl-1H-imidazoles (5) were convertible to aldehydes or ketones (3) by
1,2-Functionalized Imidazoles as Palladium Ligands: An Efficient and Robust Catalytic System for the Fluorine-Free Hiyama Reaction
作者:Regina Martínez、Isidro M. Pastor、Miguel Yus
DOI:10.1002/ejoc.201301439
日期:2014.2
Financial support from the Spanish Ministerio de Ciencia e Innovacion (MICINN) (project numbers CTQ2007-65218, CTQ2011-24165), from Consolider Ingenio 2010 (CSD2007-00006), from the Generalitat Valenciana (PROMETEO/2009/039), from the Fondos Europeos para el Desarrollo Regional (FEDER) and from the Universidad de Alicante is acknowledged.
来自西班牙国家科学与创新部长 (MICINN)(项目编号 CTQ2007-65218、CTQ2011-24165)、Consolider Ingenio 2010 (CSD2007-00006)、瓦伦西亚政府总署 (PROMETEO/2009)、Fo Europeos para el Desarrollo Regional (FEDER) 和来自阿利坎特大学的认可。
Isoprene-catalyzed lithiation of imidazole: synthesis of 2-(hydroxyalkyl)- and 2-(aminoalkyl)imidazoles
作者:Rosario Torregrosa、Isidro M. Pastor、Miguel Yus
DOI:10.1016/j.tet.2005.09.024
日期:2005.11
of isoprene (20 mol%) in THF at room temperature. By reacting this organolithium with carbonyl electrophiles 2-(hydroxyalkyl)imidazoles 3 were obtained, in good yields. As a result of the reaction of the mentioned lithium intermediate with imines 4, the corresponding 2-(aminoalkyl)imidazoles 5 were isolated in excellent yields.