中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
对氟苯甲醛 | 4-fluorobenzaldehyde | 459-57-4 | C7H5FO | 124.115 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-[18F]氟苯甲酸 | 4-[18F]fluorobenzoic acid | 10011-97-9 | C7H5FO2 | 139.115 |
—— | 4-[18F]fluorobenzyl alcohol | 659-46-1 | C7H7FO | 125.132 |
—— | 4-[18F]fluorobenzyl bromide | 134430-70-9 | C7H6BrF | 188.029 |
—— | [18F]4'-fluorobenzyl iodide | 134430-72-1 | C7H6FI | 235.029 |
2-2-[4-(4-[18F]-Fluorobenzyl)piperazin-1-yl]-2-oxoethyl}isoindolin-1-one ([18F]MEL054), is a new potent indolinone-based melanin binder designed to target melanotic tumours. [18F]MEL054 was prepared by an automated two-step radiosynthesis, comprising of the preparation of 4-[18F]fluorobenzaldehyde from 4-formyl-N,N,N-trimethylanilinium triflate, followed by reductive alkylation with 2-(2-oxo-2-piperazin-1-ylethyl)isoindolin-1-one. 4-[18F]Fluorobenzaldehyde was prepared on a GE TRACERlab FXFN module in 68 ± 8 % radiochemical yield (RCY, non-decay corrected), purified by a Sep-Pak Plus C18 cartridge and eluted into the reactor of an in-house modified Nuclear Interface [18F]FDG synthesis module for the subsequent reductive alkylation reaction. HPLC purification produced [18F]MEL054 in a collected RCY of 34 ± 9 % (non-decay corrected), the total preparation time (including Sep-Pak Plus C18 and HPLC purification) did not exceed 105 min. The radiochemical purity of [18F]MEL054 was greater than 99 % with a specific radioactivity of 71–119 GBq μmol–1 and [18F]MEL054 remained stable in saline solution (>98 %) after 3 h.
In continuation of our investigation of the dibenzylideneacetone scaffold as Aβ imaging probes, a series of derivatives containing pyridine rings with lower lipophilicity was synthesized and evaluated.