Cleavage and reassembly C≡C bonds of ynones to access highly functionalized ketones

• Main Authors: Rong, Jiaxin, Li, Haowen, Fu, Rui, Sun, Wangbin, Loh, Teck-Peng, Jiang, Yaojia
• 其他作者: School of Physical and Mathematical Sciences
• 格式: Article
• 語言: English
• 出版: 2022
• 主題: Science::Biological sciences::Biochemistry; Ynones; Carbenes
• 在線閱讀: https://hdl.handle.net/10356/155163

An economical strategy has been designed to formally cleave CC bonds of ynones through copper-catalyzed carbene chemistry. It proceeds under mild reaction conditions in a step-economy process by simultaneously cleaving the CC bonds and constructing C-C bonds. Depending on the substitution of the ynones, the reactions can proceed efficiently to generate synthetically useful 1,4-ketoaldehydes and cyclopentenone compounds. A plausible pathway is proposed that involves an active cyclopropane intermediate that consequently undergoes a cascade ring-opening reaction. The method works for a spectrum of ynones and N-tosylhydrazones that give good to excellent yields using a cheap copper catalytic system.