atom-economical synthetic method for the generation of fused indoles, using a gold-catalyzedcascadecyclization of diynes, has been developed. The reaction gave various fused indoles, such as aryl-annulated[a]carbazoles, dihydrobenzo[g]indoles, and azepino- or oxepinoindole derivatives in good to excellent yields, through an intramolecular cascade 5-endo-dig hydroamination followed by a 6- or 7-endo-dig cycloisomerization
已经开发了一种直接,简洁且原子经济的合成方法,该方法使用金催化的二炔级联环化生成稠合的吲哚。该反应通过分子内级联5-内-挖-加氢胺化,然后进行6-氨基苯甲酸酯化,得到了各种稠合的吲哚,例如芳基环化的[ α ]咔唑,二氢苯并[ g ]吲哚和氮杂环庚烷-或氧代庚并吲哚衍生物,收率良好。或7-内挖式环异构化,而不会产生理论副产物。所得的三支吲哚对T表现出有效的抗真菌活性。癣菌和Ť。风疹,说明了所描述的级联反应在药物发现中的实际应用。
Cascade Reactions of Aryl‐Substituted Terminal Alkynes Involving in Situ‐Generated α‐Imino Gold Carbenes
作者:Qiaoying Sun、Christopher Hüßler、Justin Kahle、Alexandra V. Mackenroth、Matthias Rudolph、Petra Krämer、Thomas Oeser、A. Stephen K. Hashmi
DOI:10.1002/anie.202313738
日期:2024.1.25
was achieved. It proceeds via an intermolecular gold carbene generation/C−H annulation followed by a 6-endo-dig cyclization or Pictet–Spengler reactions to selectively form fused indoles. The formation of 2-substitutedindoles and imidazoles derivatives through gold-catalyzed cyclization is also presented.