122974-04-3

Upstream product

• 383-50-6 2-fluoroethyl tosylate 
• 100-46-9 benzylamine 
• 460-08-2 2-fluoroethylamine hydrochloride 
• 100-52-7 benzaldehyde 

Downstream Products

• 1375550-48-3 C₉H₁₂FN*ClH 
• 1375550-45-0 C₁₄H₂₀FNO₂ 

Relevant academic research and scientific papers

COMPOUNDS FOR USING IN IMAGING AND PARTICULARLY FOR THE DIAGNOSIS OF NEURODEGENERATIVE DISEASES

The invention relates to compounds of formula (II) for using in imaging and particularly for the diagnosis of neurodegenerative diseases

Trifluoromethyl acting as stopper in [2]rotaxane

A modified dumbbell obtained by replacing one of the phenyl groups of the dibenzylammonium with a strong electron-withdrawing trifluoromethyl group templated the synthesis of the smallest [2]rotaxane reported so far. The trifluoromethyl group not only enhances the templating effect of the dumbbell but also acts as the stopper to prevent dethreading of a [20]crown ether macrocycle.

Synthesis of [18F]fluoroacetaldehyde. Application to [ 18F]fluoroethylation of benzylamine under reductive alkylation conditions

The radiosynthesis of a new [18F]fluoroalkylating agent, [ 18F]fluoroacetaldehyde, is described. It was produced using the Kornblum method by oxidation with dimethyl sulphoxide of 2-[18F] fluoroethyl p-toluenesulphonate ([18F]FETos). In these conditions the oxidation proceeds smoothly and rapidly to the selective conversion of tosyl esters of primary alcohols to aldehydes with no carboxylic acids being produced. The chemical identity of [18F]fluoroacetaldehyde was determined by comparing its chromatographic properties as well as those of its 2,4-dinitrophenylhydrazone (2,4-DNPH) derivative with those of, respectively, the standard fluoroacetaldehyde and its 2,4-DNPH derivative. Standard fluoroacetaldehyde was prepared by oxidation of fluoroethanol with pyridinium dichromate and characterized as its 2,4-DNPH derivative by mass spectrometry. To test its reactivity with amines under reductive alkylation conditions, [ 18F]fluoroacetaldehyde was reacted with benzylamine used as model substrate. The chemical identity of the resulting radiolabeled product was determined to be [18F]N-(2-fluoroethyl)-benzylamine by comparing its chromatographic properties with those of the synthesized standard N-(2-fluoroethyl)-benzylamine characterized by 19F and 1H NMR spectroscopy and mass spectrometry. This new fluorine-18 labelled synthon may find applications in radiolabelling peptide, protein and antibody fragments as well as in aldol condensation or in the Mannich reaction. Copyright

Radiolabelling

Compounds of the formula (I) are disclosed: [in-line-formulae]18F—(CHR)n(CH2)mCHO ??(I)[/in-line-formulae] in which n and m are independently 0 and 1 with at least one of n and m being 1, and R (if present) is a hydrogen atom or a methyl group, subject to the proviso that if n is 1 and R is methyl then m is 0. Synthesis of the compounds is described together with their use in radiolabelling reactions, e.g. for the radiolabelling of peptides to facilitate detection by Positron Emission Tomography (PET) imaging. The preferred compound is [18F]Fluoroacetaldehyde.