The O-silylated enolates of ketones and esters can be phenylthioalkylated by the chlorides (2) and (3) under ZnBr2-catalysis; ozonolysis and subsequent sulphoxide thermolysis then gives the corresponding unsaturated 1,5-dicarbonyl compounds.
酮和酯的O-甲
硅烷基化烯酸酯可以在ZnBr 2催化下通过
氯化物(2)和(3)被苯
硫基烷基化。然后进行
臭氧分解和随后的亚砜热分解,得到相应的不饱和1,5-二羰基化合物。