Design and Synthesis of Indazole–Indole Hybrid via tert-Butyl Nitrite Mediated Cascade Diazotization/Isomerization/Cyclization
作者:Abhishek Kar、Gopal Rana、Rajkamal Sahoo、Sourav Ghosh、Umasish Jana
DOI:10.1021/acs.joc.4c00377
日期:2024.5.17
metal-free approach has been presented for the synthesis of a diverse range of C-3-substituted indazole–indole hybrids using readily accessible 2-(indolin-3-ylidenemethyl)aniline derivatives. This strategy is proposed to occur via a diazonium salt intermediate that is capable of cascade isomerization and intramolecular C–N bond formation through a 5-endo-dig cyclization to achieve a wide variety of indazole–indole