p-Selective (sp2)-C-H functionalization of electron rich arenes have been achieved for acylation and alkylation reaction, respectively, with acyl/alkylselenides by organic photoredox catalysis involving interesting mechanistic pathway.
Iron-Catalyzed Reductive Ring Opening/<i>gem</i>-Difluoroallylation of Cyclopropyl Ketones
作者:Bing Yuan、Chang Zhang、Haiyan Dong、Chuan Wang
DOI:10.1021/acs.orglett.3c00398
日期:2023.3.24
By merging C–C and C–F bond cleavage, we developed a regioselective ring opening/gem-difluoroallylation of cyclopropyl ketones with α-trifluoromethylstyrenes, which proceeds under the catalysis of iron with the combination of manganese and TMSCl as the reducing agents, providing a new entry to the synthesis of carbonyl-containing gem-difluoroalkenes. Remarkably, the ketyl radical-induced selective
Banks William R., Borchert Ronald D., Hwang Dah-Ren, Appl. Radiat. and Isotop, 45 (1994) N 1, S 75-81
作者:Banks William R., Borchert Ronald D., Hwang Dah-Ren
DOI:——
日期:——
USH1209H
申请人:——
公开号:USH1209H
公开(公告)日:1993-07-06
No-carrier-added (18F)-N-methylspiroperidol
申请人:The United States of America as represented by the United States
公开号:USH0001209H1
公开(公告)日:1993-07-06
There is disclosed a radioligand labeled with a positron emitting radionuclide suitable for dynamic study in living humans with positron emission transaxial tomography. [.sup.18 F]-N-methylspiroperidol, exhibiting extremely high affinity for the dopamine receptors, provides enhanced uptake and retention in the brain concomitant with reduced radiation burden. These characteristics all combine to provide [.sup.18 F]-N-methylspiroperidol as a radioligand superior to known radioligands for mapping dopamine receptors in normal and disease states in the living brain. Additionally, a new synthetic procedure for this material is disclosed.