An indole-based in vivo imaging agent is provided by the present invention that binds with high affinity to PBR, has good uptake into the brain following administration, and which has good selective binding to PBR. The invention also includes a precursor compound useful in the synthesis of the in vivo imaging agent of the invention, as well as a method for synthesis of said in vivo imaging agent comprising use of said precursor compound, and a kit for carrying out said method. Also provided is a cassette for automated synthesis of the in vivo imaging agent. Further aspects of the invention include a radiopharmaceutical composition comprising the in vivo imaging agent of the invention, and methods for the use of said in vivo imaging agent.
Abstract An efficient nucleophilic allylic substitution of a variety of Morita–Baylis–Hillman adducts with enamines catalyzed by Pd(OAc)2 in the presence of ZnBr2 as a promoter is described in the present study. The reaction gives SN2-type 1,5-dicarbonyl compounds that may subsequently undergo an intramolecular conjugate addition onto the enone moiety affording the corresponding 1,4-adducts. All the
Sunlight-driven synthesis of γ-diketones via oxidative coupling of enamines with silyl enol ethers catalyzed by [Ru(bpy)3]2+
作者:Yusuke Yasu、Takashi Koike、Munetaka Akita
DOI:10.1039/c2cc31748f
日期:——
A photosensitizer [Ru(bpy)3]2+ catalyzes oxidative coupling reaction of enamines with silyl enol ethers under visible light irradiation by a Xe lamp or sunlight to produce γ-diketones. A 2e-oxidation process involved in this reaction is achieved by a combination of the photoexcited [Ru(bpy)3]2+ species and duroquinone, a 2e-acceptor.
The reaction of enamines with isoxazol-5-ones unsubstituted at the 4-position takes place in a manner similar to that with oxazol5-ones to give, in this case, the 4-alkenylisoxazol-5-olate salts of the appropriate amine. These salts are readily converted into the 4-alkylideneisoxazolones with hydrogen chloride. By using a mixture of ketone and base rather than the enamine, the same salts are obtained
The present invention provides a method useful in the diagnosis and monitoring of cancer wherein there is an abnormal expression of PBR. The method of the invention is particularly useful in evaluating the severity of the cancer, e.g. PBR expression correlates with cell proliferation rates, metastatic potential, tumor aggressiveness, malignancy progression. The method of the invention can therefore be applied in the determination of likely disease progression and in making an associated prognosis. Furthermore, the method of the invention can find use in determining the likely success of certain therapeutic approaches, or in the evaluation of the efficacy of certain proposed new treatments.