Radiosynthesis of 11C-Levetiracetam: A Potential Marker for PET Imaging of SV2A Expression
摘要:
The multistep preparation of C-11-levetiracetam ((CLEV)-C-11) was carried out by a one-pot radiosynthesis with 8.3 +/- 1.6% (n = 8) radiochemical yield in 50 +/- 5.0 min. Briefly, the propionaldehyde was converted to propan-l-imine in situ as labeling precursor by incubation with ammonia. Without further separation, the imine was reacted with C-11-HCN to form C-11-aminonitrile. This crude was then reacted with 4-chlorobutyryl chloride and followed by hydrolysis to yield C-11-LEV after purification by chiral high-performance liquid chromatography (HPLC). Both the radiochemical and enantiomeric purities of C-11-LEV were >98%.
Synthesis of<sup>11</sup>C-labeled Sulfonyl Carbamates through a Multicomponent Reaction Employing Sulfonyl Azides, Alcohols, and [<sup>11</sup>C]CO
作者:Marc Y. Stevens、Shiao Y. Chow、Sergio Estrada、Jonas Eriksson、Veronika Asplund、Anna Orlova、Bogdan Mitran、Gunnar Antoni、Mats Larhed、Ola Åberg、Luke R. Odell
DOI:10.1002/open.201600091
日期:2016.12
We describe the development of a new methodology focusing on 11C‐labeling of sulfonyl carbamates in a multicomponent reaction comprised of a sulfonyl azide, an alkyl alcohol, and [11C]CO. A number of 11C‐labeled sulfonyl carbamates were synthesized and isolated, and the developed methodology was then applied in the preparation of a biologically active molecule. The target compound was obtained in 24±10 %
Synthesis of [11C]/[13C]Acrylamides by Palladium-Mediated Carbonylation
作者:Jonas Eriksson、Ola Åberg、Bengt Långström
DOI:10.1002/ejoc.200600700
日期:2007.1
radioactivity of 84 GBq/mmol from 10 GBq of [11C]carbonmonoxide. [1-11C]Propyl iodide was synthesized with a specific radioactivity of 270 GBq/mmol from 12 GBq and [1-11C]butyl iodide with 146 GBq/mmol from 8 GBq.Palladium-mediated hydroxycarbonylation of acetylene was used in the synthesis of [1-11C]acrylic acid. The labelled carboxylic acid was converted to its acid chloride and subsequently treated with
[<sup>11</sup>C]CO<sub>2</sub> to [<sup>11</sup>C]CO conversion mediated by [<sup>11</sup>C]silanes: a novel route for [<sup>11</sup>C]carbonylation reactions
作者:Carlotta Taddei、Salvatore Bongarzone、Abdul Karim Haji Dheere、Antony D. Gee
DOI:10.1039/c5cc02095f
日期:——
A novel chemical methodology is described for the conversion of [11C]CO2 to [11C]CO via silane derivatives. The released [11C]CO is used for radiosynthetic applications.
Palladium(0)-Catalyzed Carbonylative Synthesis of <i>N</i>-Acylsulfonamides via Regioselective Acylation
作者:Luke S. Schembri、Jonas Eriksson、Luke R. Odell
DOI:10.1021/acs.joc.9b00740
日期:2019.6.7
a mild and convenient palladium(0)-catalyzed synthesis of N-acylsulfonamides via the carbonylative coupling of sulfonyl azides and electron-rich heterocycles. The reaction proceeds via in situ generation of a sulfonyl isocyanate followed by regioselective acylation of an indole or pyrrole nucleophile. This approach has been used to synthesize 34 indole- and pyrrole-substituted N-acylsulfonamides in