3-氰基-7-羟基香豆素是一种重要的香豆素类有机合成中间体,被广泛用于医药合成和构建荧光染料的骨架等。本文研究了两种3-氰基-7-羟基香豆素的合成方法,起始原料选用2,4-二羟基苯甲醛,另一反应物分别选择了丙二腈、氰基乙酸酯两种化合物...3-氰基-7-羟基香豆素是一种重要的香豆素类有机合成中间体,被广泛用于医药合成和构建荧光染料的骨架等。本文研究了两种3-氰基-7-羟基香豆素的合成方法,起始原料选用2,4-二羟基苯甲醛,另一反应物分别选择了丙二腈、氰基乙酸酯两种化合物,以收率、合成经济性和“三废”处理的难度为评价标准,比较得出了较优方法,随后优化了该方法中的催化剂、溶剂和反应时间等条件,并用红外光谱(IR)、核磁波谱(NMR)和高效液相色谱对目标产物进行了结构确证与纯度分析。实验结果显示产物收率为86%,结构正确,纯度≥95%,该合成方法可以实现3-氰基-7-羟基香豆素的高效制备。3-cyano-7-hydroxy-coumarin is an important intermediate of coumarin, which is widely used in pharmaceutical synthesis, construction of fluorescent dye skeleton and so on. In this paper, two synthesis methods of 3-cyano-7-hydroxy-coumarin were studied. The starting material was 2,4-dihydroxybenzaldehyde, and the other reactant was malonitrile and cyanoacetate, respectively, to construct benzopyranone ring parent nucleus. Based on the evaluation criteria of yield, synthesis economy and difficulty of “three wastes” treatment, a better method was obtained. The catalyst, solvent and reaction time of this method were optimized, and the target products were analyzed by infrared spectroscopy (IR), NMR and HPLC. The experimental results showed that the yield of the product was 86%, the structure of the product is correct, and the purity was ≥95%. This synthesis method could realize the efficient preparation of 3-cyano-7-hydroxycoumarin.展开更多
文摘目的·建立人血浆中7α-羟基-4-胆固醇烯-3-酮(7α-hydroxy-4-cholesten-3-one,C4)以及胆酸(cholic acid,CA)、鹅去氧胆酸(chenodeoxycholic acid,CDCA)的定量方法。方法·采用乙腈提取人血浆中C4、CA、CDCA,利用超高效液相色谱-串联质谱(ultra-high performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)技术,通过内标校正的标准曲线法定量C4、CA、CDCA含量。结果·经方法学验证,C4、CA、CDCA的检出限(limits of detection,LOD)分别为0.16、0.02、0.04 nmol/L,均具有良好的线性关系(均R2>0.998);重复性的相对标准偏差(relative standard deviation,RSD)均低于3.0%;日内及日间精密度的RSD均小于6%;4℃保存7 d结果稳定,RSD均小于10%;C4、CA和CDCA的平均加标回收率分别为97.7%、113.3%、105.0%。结论·该方法具有较高的检测灵敏度、良好的精密度和稳定性,可用于血浆生物样本的定量检测。
文摘3-氰基-7-羟基香豆素是一种重要的香豆素类有机合成中间体,被广泛用于医药合成和构建荧光染料的骨架等。本文研究了两种3-氰基-7-羟基香豆素的合成方法,起始原料选用2,4-二羟基苯甲醛,另一反应物分别选择了丙二腈、氰基乙酸酯两种化合物,以收率、合成经济性和“三废”处理的难度为评价标准,比较得出了较优方法,随后优化了该方法中的催化剂、溶剂和反应时间等条件,并用红外光谱(IR)、核磁波谱(NMR)和高效液相色谱对目标产物进行了结构确证与纯度分析。实验结果显示产物收率为86%,结构正确,纯度≥95%,该合成方法可以实现3-氰基-7-羟基香豆素的高效制备。3-cyano-7-hydroxy-coumarin is an important intermediate of coumarin, which is widely used in pharmaceutical synthesis, construction of fluorescent dye skeleton and so on. In this paper, two synthesis methods of 3-cyano-7-hydroxy-coumarin were studied. The starting material was 2,4-dihydroxybenzaldehyde, and the other reactant was malonitrile and cyanoacetate, respectively, to construct benzopyranone ring parent nucleus. Based on the evaluation criteria of yield, synthesis economy and difficulty of “three wastes” treatment, a better method was obtained. The catalyst, solvent and reaction time of this method were optimized, and the target products were analyzed by infrared spectroscopy (IR), NMR and HPLC. The experimental results showed that the yield of the product was 86%, the structure of the product is correct, and the purity was ≥95%. This synthesis method could realize the efficient preparation of 3-cyano-7-hydroxycoumarin.
