Merging Annulation with Ring Deconstruction: Synthesis of (<i>E</i>)-3-(2-Acyl-1<i>H</i>-benzo[<i>d</i>]imidazol-4-yl)acrylaldehyde Derivatives via I<sub>2</sub>/FeCl<sub>3</sub>-Promoted Dual C(sp<sup>3</sup>)–H Amination/C–N Bond Cleavage
作者:Cheng Xu、Guodong Yin、Feng-Cheng Jia、Yan-Dong Wu、An-Xin Wu
DOI:10.1021/acs.orglett.1c00486
日期:2021.4.2
An unprecedented I2/FeCl3-promoted cascade reaction of aryl methyl ketones with 8-aminoquinolines for the convenient synthesis of (E)-3-(2-acyl-1H-benzo[d]imidazol-4-yl)acrylaldehydes was developed by merging annulation with ring deconstruction. This novel strategy unlocked the new reactivity of 8-aminoquinolines and provided an attractive platform for the ring opening of unactivated N-heteroaromatic
前所未有的I 2 / FeCl 3促进的芳基甲基酮与8-氨基喹啉的级联反应,用于方便地合成(E)-3-(2-酰基-1 H-苯并[ d ]咪唑-4-基)丙烯醛。通过将环空和环解构相结合而开发。这种新颖的策略解锁了8-氨基喹啉的新反应性,并为未活化的N-杂芳族化合物的开环提供了一个有吸引力的平台。初步的力学研究表明,双重C(sp 3H-氨基化/ C-N键断裂是关键的反应步骤。此外,所获得产物的后期修饰成功地递送了吡唑和异恶唑衍生物,从而增加了该方法在有机合成中的实用性和应用潜力。