The present invention provides certain cyclopentyl sulfonamide derivatives of formula (I): useful for potentiating glutamate receptor function in a mammal. It also relates to novel cyclopentyl sulfonamide derivatives, to processes for their preparation and to pharmaceutical compositions containing them.
Photoinduced C-C Bond Cleavage and Oxidation of Cycloketoxime Esters
作者:Binlin Zhao、Hui Tan、Cheng Chen、Ning Jiao、Zhuangzhi Shi
DOI:10.1002/cjoc.201800206
日期:2018.11
the traditional Beckmann rearrangement process has been established to build cyano‐containing ketones in the presence of photocatalyst. This novel transformation is remarkable with selective C—Cbondcleavage and an oxidation process enabled by DMSO used as the solvent, oxidant, and oxygen source avoiding acid, base and toxic cyanide salts as the cyano source. Further applications in late‐stage modification
Catalyticenantioselective chemical reactions involving highly reactive radical species remain largely unexplored. We report herein for the first time a novel enantioselective radical ring-opening cyanation of redox-active oxime esters by dual photoreodox and copper catalysis. This mild protocol shows good functional group tolerance and broad substrate scope, producing a wide range of optically active
Copper-Catalyzed Ring-Opening Radical Trifluoromethylation of Cycloalkanone Oximes
作者:Zhonglin Liu、Haigen Shen、Haiwen Xiao、Zhentao Wang、Lin Zhu、Chaozhong Li
DOI:10.1021/acs.orglett.9b01803
日期:2019.7.5
conditions, providing an efficient and general entry to γ- or δ-CF3-substituted nitriles via tandem N–O and C(sp2)–C(sp3) bond cleavage and C(sp3)–CF3 bondformation. The protocol exhibits a broad substrate scope and wide functionalgroup compatibility. A radical mechanism involving the CF3 transfer from Cu(II)–CF3 complexes to alkyl radicals is proposed.