Synthesis and Analysis of Glucuronic Acid-Conjugated Metabolites of 4-Bromo-2,5-Dimethoxyphenethylamine.
Journal of forensic sciences – March 01, 2017
Source: PubMed
Summary
Pinpointing how substances break down in the body is vital for forensic science. Researchers achieved the first chemical synthesis of two key glucuronic acid-conjugated metabolites of 2C-B. They then developed a straightforward method to detect these specific metabolism products directly in urine samples. This breakthrough provides a robust new tool for identifying 2C-B's presence and understanding its metabolic fate, significantly enhancing forensic analysis.
Abstract
In the study reported here, two glucuronic acid-conjugated metabolites of 4-bromo-2,5-dimethoxyphenethylamine (2C-B)-a ring-substituted psychoactive phenethylamine-were chemically synthesized for the first time and a method for analyzing them in urine was developed. β-D-Glucuronide of 4-bromo-2,5-dimethoxyphenylethylalcohol was successfully synthesized using methyl 2,3,4-tri-Ο-acetyl-1-O-(trichloroacetimidoyl)-α-D-glucuronate as a glucuronyl donor and boron trifluoride diethylether complex as a Lewis acid catalyst. β-D-Glucuronide of 4-bromo-2,5-dimethoxyphenylacetic acid was synthesized by condensing 4-bromo-2,5-dimethoxyphenylacetic acid and benzyl D-glucuronate followed by benzyl group deprotection based on catalytic hydrogenation. Two glucuronic acid-conjugated metabolites of 2C-B in urine were qualitatively and semiquantitatively evaluated via direct liquid chromatography/mass spectrometry (LC/MS) analysis of a diluted urine sample. The simple method proposed is expected to be useful for studying the metabolic fate of 2C-B.