AbstractAn efficient and straightforward methodology for the synthesis of 1,2,2‐triarylethanones and 2,2‐diarylethanones has been developed, via a visible light‐promoted/Brønsted acid‐catalyzed carbonyl‐alkyne metathesis/transfer hydrogenation one‐pot reaction of benzoquinone, arylalkyne, and Hantzsch ester. A series of synthetically useful triarylethanones and diarylethanones were achieved in excellent yield under mild reaction conditions. This protocol is operationally simple, photocatalyst‐free, and scalable and has a broad substrate scope. Moreover, this reaction involves the formation of three chemical bonds, namely C=O, C−C, and C−H bonds. This feature enables de novo synthesis of 1,2,2‐triarylethanones and 2,2‐diarylethanones. Additionally, this protocol provides a convenient and practical synthetic route for tamoxifen.
摘要 通过可见光促进/勃氏酸催化的苯醌、芳基炔和汉茨赫酯的羰基炔元化/转移加氢一锅反应,开发了一种高效、直接合成 1,2,2-三芳基烷酮和 2,2-二芳基烷酮的方法。在温和的反应条件下,获得了一系列对合成有用的三芳基烷酮和二芳基烷酮,收率极高。该方案操作简单、不需光催化剂、可扩展,并且具有广泛的底物范围。此外,该反应涉及三种化学键的形成,即 C=O、C-C 和 C-H 键。这一特点使得 1,2,2-三芳基lethanones 和 2,2-二芳基lethanones 得以从头合成。此外,该方案还为他莫昔芬提供了一条方便实用的合成路线。