the ortho-silylation of aryl ketone, benzaldehyde, and benzyl alcohol derivatives has been developed in which a hydroxyl group formally serves as the directing element for Ir-catalyzed arene C-H bond activation. One-pot generation of a (hydrido)silyl ether from the carbonyl compound or alcohol is followed by dehydrogenative cyclization at 80-100 °C in the presence of norbornene as a hydrogen acceptor
已开发出芳基酮、
苯甲醛和
苯甲醇衍
生物的邻甲
硅烷化策略,其中羟基正式作为 Ir 催化
芳烃 CH 键活化的指导元素。从羰基化合物或醇一锅生成(氢化)甲
硅烷基醚,然后在
降冰片烯作为氢受体和 1 mol % [Ir(cod)OMe ]2 和 1,10-
菲咯啉作为催化剂形成
苯并恶唑。通过 Tamao-Fleming 氧化或 Hiyama 交叉偶联转化为
苯酚或联芳基衍
生物证明了
苯并恶唑产品的合成效用。CH 甲
硅烷基化产物的这两种转化都利用系统中的 Si-O 键,并通过用氢氧化物活化甲
硅烷基部分来进行,