<sup><i>t</i></sup>BuOK-Promoted Cyclization of Imines with Aryl Halides
作者:Ya-Wei Li、Hong-Xing Zheng、Bo Yang、Xiang-Huan Shan、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.orglett.0c01615
日期:2020.6.5
A transition-metal-free indole synthesis using radical coupling of 2-halotoluenes and imines via the later-stage C–N bond construction was reported for the first time. It includes an aminyl radical generation by C–H cleaving addition of 2-halotoluenes to imines via the carbanion radical relay and an intramolecular coupling of aryl halides with aminyl radicals. One standard condition can be used for
One-Pot Synthesis of 1,2-Disubstituted 4-, 5-, 6-, and 7-Azaindoles from Amino-<i>o</i>-halopyridines via N-Arylation/Sonogashira/Cyclization Reaction
作者:Sara I. Purificação、Marina J. D. Pires、Rafael Rippel、A. Sofia Santos、M. Manuel B. Marques
DOI:10.1021/acs.orglett.7b02403
日期:2017.10.6
A direct synthesis of several 1,2-disubstituted 4-, 5-, 6-, and 7-azaindoles from available amino-o-halopyridines is described. This procedure involves a palladium-catalyzed N-arylation followed by a Sonogashira reaction and subsequent cyclization in a one-pot manner, exhibiting a wide scope and compatibility with electron-withdrawing and electron-donating groups. The strategy represents an advancement
Ultrasound assisted one-pot synthesis of 1,2-diaryl azaindoles via Pd/C-Cu catalysis: Identification of potential cytotoxic agents
作者:Rapolu Venkateshwarlu、Shambhu Nath Singh、Vidavalur Siddaiah、Hindupur Ramamohan、Rambabu Dandela、Manojit Pal
DOI:10.1016/j.tetlet.2019.151326
日期:2019.12
Ultrasound assisted one-pot and direct access to 1,2-diaryl substituted azaindole derivatives has been achieved via the sequential N-arylation followed by coupling-cyclization under Pd/C-Cu catalysis. The methodology involved initial C-N bond forming reaction (step 1) between an appropriate o-bromo substituted amino pyridine and iodoarene followed by C-C and C-N bond formation (step 2) between the