GC–MS analysis of regioisomeric substituted N-benzyl-4-bromo-2,5-dimethoxyphenethylamines

Add time:07/11/2019    Source:sciencedirect.com

The six N-(dimethoxybenzyl)-4-bromo-2,5-dimethoxyphenethylamine regioisomers are potential designer compounds related to the common NBOMe drug N-(2-methoxy)benzyl-4-bromo-2,5-dimethoxyphenethylamine (25B-NBOMe). These six compounds represent the incorporation of one additional methoxy-group into the common NBOMe molecular framework. The compounds were prepared from commercially available precursor materials and their electron ionization mass spectra (EI-MS) are quite similar yielding nearly identical fragment ions. The 2′,3′-dimethoxybenzyl regioisomer gave a unique fragment ion of significant abundance in the EI-MS at m/z 136. Baseline gas chromatographic resolution of the six regioisomers was achieved using a midpolarity phase of 50% phenyl and 50% dimethyl polysiloxane and the more crowded dimethoxy substitution patterns eluted first under temperature programming conditions.The EI mass spectra for the TFA-derivatives of these six regioisomers gave a molecular ion of significant abundance at m/z 505/507, unlike the parent compounds. Differentiation and specific identification of all six of the regioisomers was possible based on a combination of different base peak ions (m/z 151 or 242/244), unique fragment ions (m/z 136 and m/z 263), along with differences in the relative abundance of ions at m/z 121 and m/z 91.

We also recommend Trading Suppliers and Manufacturers of (4-BROMO-BENZYL)-PYRIDIN-3-YLMETHYL-AMINE (cas 510723-60-1). Pls Click Website Link as below: cas 510723-60-1 suppliers

Prev:Quantitative structure–retention relationships applied to liquid chromatography gradient elution method for the determination of carbonyl-2,4-dinitrophenylhydrazone compounds
Next:The crystal structures of 1-(4-bromo-2,3,5,6-tetrafluorophenyl)-3-benzyl-methylimidazolium bromides)