作者:M. S. Boukraa、D. Deruaz、A. Bannier、M. Desage、J. L. Brazier
DOI:10.1002/jlcr.2580360809
日期:1995.8
3-[Methyl-13C]xanthine, 7-[Methyl-13C]xanthe, 1,3-[Dimethyl-13C2]xanthine (theophylline-1,3-[13CH3]2), 1,7-[Dimethyl-13C2]xanthine (paraxanthine-1,7-[13CH3]2), and 3,7-[Dimethyl-13C2]xanthine (theobromine-3,7-[13CH3]2) were synthesized by nucleophilic substitution reaction (SN2) from xanthine (X) and iodomethane-[13C]. The 3-isobutylparaxanthine-7-[13CH3] was prepared from 3-isobutyl-1-methylxanthine (IBMX). The compounds were purified by reverse phase semipreparative liquid chromatography and their chemical structure and purity verified by GC-MS.
3-[Methyl-13C]xanthine, 7-[Methyl-13C]xanthe, 1,3-[Dimethyl-13C2]xanthine (theophylline-1,3-[13CH3]2), 1,7-[Dimethyl-13C2]xanthine (paraxanthine-1,7-[13CH3]2),和 3,7-[二甲基-13C2]黄嘌呤(可可碱-3,7-[13CH3]2)是由黄嘌呤(X)和碘甲烷-[13C]通过亲核取代反应(SN2)合成的。3-isobutylparaxanthine-7-[13CH3] 由 3-isobutyl-1-methylxanthine (IBMX) 制得。这些化合物通过反相半分离液相色谱法纯化,并通过气相色谱-质谱法验证其化学结构和纯度。