中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
二[2-(2-氟乙氧基)乙氧基]甲烷 | 1,13-difluoro-3,6,8,11-tetraoxa-tridecane | 463-39-8 | C9H18F2O4 | 228.236 |
—— | 1-chloro-2-(2-fluoroethoxy)ethane | 373-20-6 | C4H8ClFO | 126.558 |
Muscarinic receptors have been implicated in neurological disorders including Alzheimer’s disease, Parkinson’s disease, and schizophrenia. Nineteen derivatives of thiadiazolyltetrahydropyridine (TZTP), a core that has previously shown high affinities towards muscarinic receptor subtypes, were synthesized and evaluated via in vitro binding assays. The title compound, a fluoro-polyethyleneglycol analog of TZTP (4c), was subsequently labelled with fluorine-18. Fluorine-18-labelled 4c was produced, via an automated synthesis, in an average radiochemical yield of 36% (uncorrected for decay), with high radiochemical purity (>99%) and high specific activity (326 GBq/µmol; end-of-bombardment), within 40 min (n = 3). Ex vivo biodistribution studies following tail-vein injection of [18F]4c in conscious rats displayed sufficient brain uptake (0.4%–0.7% injected dose / gram of wet tissue in all brain regions at 5 min post injection); however, there were substantial polar metabolites present in the brain, thereby precluding future use of [18F]4c for imaging in the central nervous system.