A visible-light-induced and iron-catalyzed methylation of arylacrylamides by dimethyl sulphoxide (DMSO) is achieved, leading to 3-ethyl-3-methyl indolin-2-ones in high yields. This reaction tolerates a series of functional groups, such as methoxy, trifluoromethyl, cyano, nitro, acetyl and ethyloxy carbonyl groups. The visible-light promoted radical methylation and arylation of the alkenyl group are
通过
二甲基亚砜(
DMSO)实现了可见光诱导的
铁催化的芳基
丙烯酰胺甲基化,从而以高收率得到了
3-乙基-3-甲基吲哚-2-酮。该反应容许一系列官能团,例如甲氧基,三
氟甲基,
氰基,硝基,乙酰基和乙氧基羰基。烯基的可见光促进的自由基甲基化和芳基化参与该反应。