The novel electrophilic selenium transfer reagent phenylsulfinylselenyl chloride, PhSO2SeCl, 3 has been prepared and reacted with enolisable carbonyl compounds to yield α-selenoketones and diselenides; reaction of reagent 3 with arylamines in the presence of triethylamine and dimethylbutadiene affords 1,2-selenazine derivatives, providing the first evidence for DielsâAlder trapping of selenonitroso intermediates, ArâNSe.
制备了新型亲电
硒转移试剂苯亚磺酰基
氯化硒(PhSO2SeCl)3,并与可烯化的羰基化合物反应生成δ-
硒酮和二
硒化物;试剂 3 与芳基胺在
三乙胺和二甲基
丁二烯存在下反应生成 1,2-selenazine 衍
生物,首次证明了
硒亚硝基中间体 ArâNSe 的 DielsâAlder 陷阱。