We report the visible-light-induced radical coupling reaction of silyl enol ethers with α-bromocarbonyl compounds to give 1,4-dicarbonyls. The reaction was effectively accelerated using an inexpensive organic dye (eosin Y) as a photoredox catalyst. 1,4-Dicarbonyl compounds alone were afforded, without the generation of carbonyl adducts of the α-halocarbonyls, which are usually generated in the presence
我们报道了可见光诱导的甲
硅烷基烯醇醚与α-
溴羰基化合物的自由基偶联反应,得到1,4-二羰基。使用廉价的有机
染料(
曙红Y)作为光氧化还原催化剂可有效地促进反应。仅提供1,4-二羰基化合物,而没有生成α-卤代羰基的羰基加合物,α-卤代羰基的羰基加合物通常是在
氟阴离子或
路易斯酸的存在下生成的。将多种甲
硅烷基烯醇醚,α-
溴代酮,α-
溴代酸酯和α-
溴代酰胺应用于该系统以产生偶联化合物。