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
作者:Mallinath B. Hadimani、Rajeswari Mukherjee、Ranjan Banerjee、Mai E. Shoman、Omar M. Aly、S. Bruce King
DOI:10.1016/j.tetlet.2015.09.002
日期:2015.10
basic hydrolysis yields the ring expansion product cyclichydroxamicacids in 12–81% yield. Reactions of substituted cyclopentanones provide ring expanded products where the –NOH group regioselectively inserts to the more substituted position and gives a better yield compared to the treatment of the same ketone with a basic solution of Piloty’s acid. Reaction of phosphines with acyloxy nitroso compounds
Cu-Catalyzed Redox-Neutral Ring Cleavage of Cycloketone <i>O</i>-Acyl Oximes: Chemodivergent Access to Distal Oxygenated Nitriles
作者:Wenying Ai、Yaqian Liu、Qian Wang、Zhonglin Lu、Qiang Liu
DOI:10.1021/acs.orglett.7b03707
日期:2018.1.19
chemodivergent copper-catalyzed ring opening of cycloketone oximes via radical-mediated C–C bond cleavage under redox-neutral conditions is described. This method allows the divergent synthesis of γ- and δ-acyloxylated, alkoxylated, and hydroxylated nitriles while avoiding the use of toxic cyanide reagents. Moreover, these reactions proceed under very mildconditions with good functional group tolerance