Fluorescent Labeling Reagents. Part 1. 3-(4-(Bromomethyl)phenyl) -7-(diethylamino)-2H-1-benzopyran-2-one (MPAC-Br): A Highly Sensitive Fluorescent Derivatization Reagent for Carboxylic Acids in High-Performance Liquid Chromatography.
作者:Haruko TAKECHI、Seiji KAMADA、Minoru MACHIDA
DOI:10.1248/cpb.44.793
日期:——
7-Dimethylaminocoumarin derivatives were synthesized and the characteristics of their absorption and emission spectra were investigated. Among them, 3-aryl-7-dimethylaminocoumarins were shown to be promising candidates as the fluorogenic groups for highly sensitive derivatization reagents. Based on the spectroscopic studies, 3-[4-(bromomethyl)phenyl]-7-(diethylamino)-2H-1-benzopyran-2-one (MPAC-Br) was designed and synthesized as a fluorescent derivatization reagent for carboxylic acids in HPLC. Saturated carboxylic acids (C4-C18) were derivatized almost quantitatively into the corresponding fluorescent MPAC-esters by treatment with MPTAC-Br. The MPAC-esters of these acids were clearly separated on a reversed-phase HPLC column (Intertsil ODS-2, mobile phase : methanol-water, excitation wavelength 403 nm; emission wavelength 474 nm). The detection limit (S/N=17) of lauric acid, as a test compound, was 15 fmol/10 μl.
合成了7-二甲氨基香豆素衍生物,并研究了其吸收和发射光谱的特征。其中,3-芳基-7-二甲氨基香豆素被证明是作为高灵敏度衍生化试剂的荧光基团的有前途的候选者。基于光谱研究,设计并合成了3-[4-(溴甲基)苯基]-7-(二乙氨基)-2H-1-苯并吡喃-2-酮(MPAC-Br),作为HPLC中羧酸的荧光衍生化试剂。通过与MPTAC-Br处理,饱和羧酸(C4-C18)几乎定量衍生化为相应的荧光MPAC酯。这些酸的MPAC酯在反相HPLC柱(Intertsil ODS-2,流动相:甲醇-水,激发波长403 nm;发射波长474 nm)上得到了清晰分离。作为测试化合物的月桂酸的检测限(S/N=17)为15 fmol/10 μl。