Solbach, C. published the artcileEfficient radiosynthesis of carbon-11 labelled uncharged Thioflavin T derivatives using [11C]methyl triflate for β-amyloid imaging in Alzheimer’s Disease with PET, Recommanded Product: 2-(4-Aminophenyl)-6-methylbenzothiazole, the publication is Applied Radiation and Isotopes (2005), 62(4), 591-595, database is CAplus and MEDLINE.
The synthesis of carbon-11 amino function labeled uncharged Thioflavin T derivatives is known to be performed by reaction of the demethyl-precursors with [11C]methyl iodide but the labeling yields are only mediocre. The use of [11C]methyl triflate improved the radiochem. yield of three potential β-amyloid imaging PET-radiotracers significantly. Performance of the labeling reaction by reacting the corresponding precursor mols. with [11C]methyl triflate for 1 min at 80° led to radiochem. yields of 44±10% (n = 5) for [11C]6-Me-BTA-1, 68±4% (n = 10) for [11C]BTA-1 and 58±2% (n = 5) for [11C]6-OH-BTA-1 with respect to [11C]methyl triflate. In production runs (60 min, 50 μA) up to 6500 MBq (mean: 4000±1900 MBq) of [11C]6-Me-BTA-1, 7900 MBq (mean: 6000±1000 MBq) of [11C]BTA-1 and 7100 MBq (mean: 6300±600 MBq) of [11C]6-OH-BTA-1 could be obtained ready for i.v. injection. The radiochem. purity was >95% with specific activities in the range of 80-120 GBq/μmol (EOS) within a total synthesis time of less than 40 min after EOB.
Applied Radiation and Isotopes published new progress about 92-36-4. 92-36-4 belongs to thiazole, auxiliary class Organic Pigment, name is 2-(4-Aminophenyl)-6-methylbenzothiazole, and the molecular formula is C12H15NO, Recommanded Product: 2-(4-Aminophenyl)-6-methylbenzothiazole.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica