Facile Conversion of Amino Acids into 1-Alkyl Imidazole-2-thiones, and Their Oxidative Desulfurization to Imidazoles with Benzoyl Peroxide
作者:Peter Schreiner、Derek Wolfe
DOI:10.1055/s-2007-983740
日期:2007.7
condensed to 3-alkyl 2-thiohydantoins, which were reduced with a mixture of sodium borohydride and lithium chloride and dehydrated to 1-alkyl imidazole-2-thiones. These were oxidatively desulfurized to imidazoles with benzoyl peroxide. No chromatography was required for model compounds. The methods developed were used to elaborate tyrosine to 1,4 -di(p -methoxybenzyl)imidazole, a common intermediate in
甘氨酸用异硫氰酸酯酰化并缩合为 3-烷基 2-硫代乙内酰脲,再用硼氢化钠和氯化锂的混合物还原并脱水为 1-烷基咪唑-2-硫酮。用过氧化苯甲酰将它们氧化脱硫成咪唑。模型化合物不需要色谱。开发的方法用于将酪氨酸精制为 1,4-二(对甲氧基苄基)咪唑,这是从海绵 Leucetta 合成三种咪唑的常见中间体。