Iodine-catalyzed C3-formylation of indoles using hexamethylenetetramine and air
2017
Wang, Qing-Dong | Yang, Jin-Ming | Fang, Dong | Ren, Jiangmeng | Zeng, Bu-Bing
An efficient iodine-catalyzed chemoselective 3-formylation of free (N–H) and N-substituted indoles was achieved by using hexamethylenetetramine (HMTA) in the presence of activated carbon under air atmosphere. This new method could provide 3-formylindoles in moderate to excellent yields with fairly short reaction times. Moreover, this catalytic formylation of indoles procedure can be applied to gram-scale synthesis.
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