Addition-Hydroamination Reactions of Propargyl Cyanamides: Rapid Access to Highly Substituted 2-Aminoimidazoles
作者:Robert L. Giles、John D. Sullivan、Andrew M. Steiner、Ryan E. Looper
DOI:10.1002/anie.200900160
日期:2009.4.14
pharmacophore, the 2‐aminoimidazole moiety, can be accessed with a variety of substitution patterns through an addition–hydroamination–isomerization sequence (see scheme; R1,R4,R5=alkyl; R3=alkyl, aryl; R2=H, alkyl, aryl). The synthesis of the propargyl cyanamide precursors through a three‐component coupling enables the preparation of this important heterocyclic core structure in just three steps.
有价值的药效基团2-氨基咪唑部分可通过加成-加氢胺化-异构化序列(参见方案; R 1,R 4,R 5 =烷基; R 3 =烷基,芳基; R 2 = H,烷基,芳基)。通过三组分偶联合成炔丙基氰酰胺前体,仅需三个步骤即可制备这种重要的杂环核心结构。