A novel approach to synthesize symmetric 1,7-dicarbonyl compounds via a tandem radical additionâeliminationâaddition reaction of S-carbonylmethyl xanthates with allylmethylsulfone and its analogues has been developed. Radicals were produced from S-carbonylmethyl xanthates by adding dilauroyl peroxide and reacted with allylmethylsulfone or analogues to generate terminal olefins as intermediates. The excessive radicals reacted with the intermediate olefins immediately to give adducts of symmetric 1,7-dicarbonyl compounds. This is an efficient method to synthesize 1,7-dicarbonyl compounds under mild conditions.
一种新方法已经被开发,通过S-羰基甲基
黄嘌呤与环基甲基亚砜及其类似物的串联自由基加成–消除–加成反应合成对称的1,7-二羰基化合物。自由基是通过向S-羰基甲基
黄嘌呤中添加二月桂油过氧化物生成的,并与环基甲基亚砜或其类似物反应生成末端烯烃作为中间体。过量的自由基立即与中间烯烃反应,形成对称的1,7-二羰基化合物的加合物。这是一种在温和条件下合成1,7-二羰基化合物的高效方法。