Diastereoselective Synthesis of Bicyclo[3.3.0]octenones by Copper-Catalyzed Transannular Ring-Closing Reaction
作者:Qiongwen Kang、Yuanyang Mu、Yang Yuan、Ye Wang、Shuxin Jin、Chengyu Wang、Yanzhong Li
DOI:10.1021/acs.orglett.2c02163
日期:2022.8.19
A novel and efficient copper-catalyzed transannular ring-closing reaction of eight-membered rings has been developed that provides a straightforward way to synthesize bicyclo[3.3.0]octane derivatives in good yields. Mechanistic studies revealed that the reaction pathway might involve chlorination followed by the Kornblum reaction. Readily accessible starting materials and good functional group tolerance
Consecutive Three-Component Synthesis of Ynones by Decarbonylative Sonogashira Coupling
作者:Eugen Merkul、Thomas Oeser、Thomas J. J. Müller
DOI:10.1002/chem.200900119
日期:2009.5.11
7‐aza‐indoles, or pyrroles with oxalyl chloride and subsequent Pd/Cu‐catalyzed decarbonylative alkynylation with terminal alkynes furnishes alkynones under very mild conditions. 4‐(Indol‐3‐yl)‐, 4‐(7‐aza‐indol‐3‐yl)‐, and 4‐(pyrrol‐2‐yl)‐2‐amino pyrimidines can be readily obtained in a concise two‐step synthesis starting from N‐substituted indoles, 7‐aza‐indoles, or pyrroles (see scheme).