Facile synthesis of bis-1,3-dicarbonyl compounds using inert dichloromethane as a one-carbon source
作者:Li-Ming Jiang、Kai Xiang、Hai-Juan Jiao、Jing-Lin Yang、Heng-Tong Qu、Xue-Tao Xu、Wen-Bao、Dao-Yong Zhu、Shao-Hua Wang
DOI:10.1016/j.tetlet.2023.154564
日期:2023.6
simple and convenientprocedure for the preparation of valuable bis-1,3-dicarbonyl-substituted methane compounds and their derivatives has been developed using inert dichloromethane as one-carbon source in good to excellent yields. The advantages of this protocol are mild reaction conditions, easily scalable and good functional group compatibility. Moreover, the use of cyclic secondaryamine as the promoter
Methylene-Bridged Dimerization by Cu-Catalyzed Deconstructive C–C Cleavage of Oxacycloalkane
作者:Xu Yuan、Jimei Yang、Xingjiang Yang、Na He、Mingyuan Han、Jun Lin、Wei Yu、Xiaohong Cheng、Yi Jin
DOI:10.1021/acs.orglett.3c02015
日期:2023.8.4
Herein, we demonstrate the successful utilization of copper catalysis and oxygenoxidation for consecutive C(sp3)–C(sp3) bond cleavage in alkyl cyclic ethers. A key step involves a copper–oxygen autoxidation process, generating in situ alkoxy radicals and triggering sequential C–C bond cleavage. This β-oxidative cleavage strategy enables the use of cyclic ethers as valuable C1 building blocks for the synthesis