Synthesis of Functionalized Indole-1-oxide Derivatives via Cascade Reactions of Allenynes and <sup><i>t</i></sup>BuONO
作者:Yan He、Tian Feng、Xuesen Fan
DOI:10.1021/acs.orglett.9b00968
日期:2019.6.7
2-diones via the cascade reaction of allenynes with alcohols/amines and tBuONO without using any catalyst. Mechanistically, the formation of 5-oxo-2H-benzo[g]indole-1-oxides involves a cascade process combining [2 + 2] cycloaddition, 1,6-addition, and ring expansion of the in situ formed cyclobutene intermediate. The construction of naphthalene-1,2-diones should undergo a ring-opening pathway. Moreover,
本文提出了通过烯丙炔与醇/胺和t BuONO的级联反应,无需使用任何催化剂即可获得5-oxo-2 H-苯并[ g ]吲哚-1-氧化物/官能化萘-1,2-二酮的新方法。从机理上讲,5-oxo-2 H-苯并[ g ]吲哚-1-氧化物的形成涉及级联过程,该级联过程将原位形成的环丁烯中间体的[2 + 2]环加成,1,6-加成和环膨胀结合在一起。萘1,2-二酮的构建应经历开环路径。此外,通过将苯并吲哚-1-氧化物容易地转化成药学上重要的1 H-苯并[ g ]吲哚-5-醇衍生物,证明了其实用性。