to give 9-chalcogenophosphoryl-9,10-dihydroacridines in 61–94% yields. This contrasts with pyridines, which under similar conditions undergo an SNHAr reaction, wherein electron-deficient acetylenes play the role of oxidants. For acridine, the SNHAr step has been accomplished by the oxidation of the intermediate 9-phosphoryl-9,10-dihydroacridines (X = O) with chloranil.
cr啶在无催化剂条件下于70–75°C(存在和不存在缺乏电子的
乙炔)下添加仲膦
硫属元素化物HP(X)R 2(X = O,S,Se; R = Ar,ArAlk) ),以61-94%的收率得到9-
硫属
磷酰基-9,10-二氢ac啶。这与
吡啶相反,
吡啶在类似条件下进行S N H Ar反应,其中缺电子的
乙炔起氧化剂的作用。为
吖啶,在S Ñ ħ
氩步骤已经由中间体9 -
磷酰基-9,10- dihydroacridines(X = O)与
氯醌的氧化来实现的。