Synthesis of Coumarin Conjugates of Biological Thiols for Fluorescent Detection and Estimation
作者:Alan Katritzky、Tarek Ibrahim、Srinivasa Tala、Nader Abo-Dya、Zakaria Abdel-Samii、Said El-Feky
DOI:10.1055/s-0030-1259991
日期:2011.5
Coumarin-labeled thioesters are efficiently prepared from biological thiols using N-coumarin-3-carbonyl benzotriazoles. Absorption (λabs), fluorescence (λem) wavelength maxima and quantum yields (Ï) for the thioesters are measured in buffer solution at physiological pH 7.4. Quantum yields (Ï = 0.0318-0.1068) of four of the products are higher than their precursor 7-methoxy-3-(1H-benzotriazol-1-ylcarbonyl)-2H-chromen-2-one (Ï = 0.0195), suggesting that derivatives of this type could be suitable for quantitative thiol assays.
带香豆素标记的硫酯是通过使用N-香豆素-3-羧酰苯并三氮唑有效制备的。硫酯在生理pH 7.4的缓冲溶液中测量其吸收(λabs)、荧光(λem)波长最大值和量子产率(Φ)。四种产物的量子产率(Φ = 0.0318-0.1068)高于其前体7-甲氧基-3-(1H-苯并三氮唑-1-基羧酰)-2H-色烯-2-酮(Φ = 0.0195),这表明此类衍生物可能适用于定量硫醇检测。