Employing TosMIC as a C1N1 “Two-Atom Synthon” in Imidazole Synthesis by Neighboring Group Assistance Strategy
作者:Xiao Geng、Can Wang、Chun Huang、Yang Bao、Peng Zhao、You Zhou、Yan-Dong Wu、Ling-ling Feng、An-Xin Wu
DOI:10.1021/acs.orglett.9b04060
日期:2020.1.3
I2/FeCl3-co-promoted formal [2 + 2+1] annulation of aryl methyl ketones, 2-aminobenzyl alcohols, and p-toluenesulfonylmethyl isocyanide (TosMIC) by neighboring group (-CH2OH) assistance. This is a novel example of using the Van Leusen reagent as a unique C1N1 "two-atom synthon" in the synthesis of imidazoles. Preliminary mechanism studies showed that TsCH2NH2 might be the key intermediate in this reaction
我们报告了I2 / FeCl3共促进的芳基甲基酮,2-氨基苄醇和对甲苯磺酰基甲基异氰酸酯(TosMIC)的邻域(-CH2OH)协助的正式[2 + 2 + 1]环化反应。这是在合成咪唑时使用Van Leusen试剂作为独特的C1N1“双原子合成子”的新例子。初步机理研究表明,TsCH2NH2可能是该反应的关键中间体。此外,该反应不仅解锁了咪唑合成的新策略,而且还开发了TosMIC的新反应性。