Ru<sub>3</sub>(CO)<sub>12</sub>-Catalyzed Intermolecular Cyclocoupling of Ketones, Alkenes or Alkynes, and Carbon Monoxide. [2 + 2 + 1] Cycloaddition Strategy for the Synthesis of Functionalized γ-Butyrolactones
作者:Mamoru Tobisu、Naoto Chatani、Taku Asaumi、Katsuya Amako、Yutaka Ie、Yoshiya Fukumoto、Shinji Murai
DOI:10.1021/ja003018i
日期:2000.12.1
The ruthenium-catalyzed intermolecular cyclocoupling of ketones (or aldehydes), alkenes (or alkynes), and CO, which leads to γ-butyrolactones, is described. The reaction represents the first example of the catalytic synthesis of heterocycles via an intermolecular carbonylative [2 + 2 + 1] cycloaddition. A wide variety of ketones, such as α-dicarbonyl compounds and N-heterocyclic ketones, can be used
描述了钌催化的酮(或醛)、烯烃(或炔烃)和 CO 的分子间环偶联,这导致了 γ-丁内酯。该反应代表了通过分子间羰基化 [2 + 2 + 1] 环加成催化合成杂环的第一个例子。在这种环加成反应中可以使用多种酮,例如 α-二羰基化合物和 N-杂环酮。加入膦对α-二羰基化合物的反应非常有效。在检查的膦中,P(4-CF3C6H4)3 代表了选择的添加剂。环状烯烃、未极化的末端烯烃和内炔可成功用于合成高度官能化的内酯。在芳族酮酯的芳族部分引入CF3基团加速了酮酯与乙烯的反应,而引入MeO基团则提高了N-杂环酮与乙烯的反应速率。反应速率增加...