柠檬醛还原制备橙花醇香叶醇的新方法

以水和苯作混合溶剂,以硼氢化钠作还原剂,采用相转移催化法还原柠檬醛合成橙花醇香叶醇,并对影响还原反应的各种因素进行研究,找出最佳工艺条件

醇类香料的合成及其结构与香气特征的关系

本文综述用作香料的醇类化合物和酯类化合物的各种合成方法，并探讨此两类化合物结构与香气特征间的关系

柠檬醛还原制备橙花醇香叶醇的新方法

以水和苯作混合溶剂，以硼氢化钠作还原剂，采用相转移催化法还原柠檬醛合成橙花醇香叶醇，从ＰＥＧ系列和阳离子型相转移催化剂中选择出较好的相转移催化剂ＰＥＧ ４００，找出混合溶剂水和苯的体积比以２∶１较好，探索出本实验条件下的最佳工艺条件为：柠檬醛０００２ｍｏｌ，硼氢化钠００１２ｍｏｌ，ＰＥＧ ４００１ｇ，水２０ｍｌ，苯１０ｍｌ，反应温度５５℃，反应时间２ｈ，橙花醇香叶醇收率在９４％以上

柠檬醛还原制备橙花醇香叶醇的新方法

橙花醇和香叶醇互为顺反异构体，均具有温和的香甜气味，呈玫瑰花香。它们主要用于调配玫瑰香精，并作为主剂或基香使用，其用途较广泛，调香用量相当大。以柠檬醛为原料制备橙花醇香..

Exploration in Organic Chemistry Experiment Teaching Reform

该文针对传统有机实验课的缺点和不足,介绍了对有机实验课教学内容的探索,其中包括对有机实验课教学内容、方法的改革,突出注重培养学生的综合素质和创新能力. Aiming at the defects of conventional organic chemistry experiment teaching, this paper explores the reform on the organic chemistry experiment teaching, including course content and teaching methods, the importance about the cultivation of the integrative quality and innovation abilities of students is emphasized

Studies on synthesis of neryl butyrate and geranyl butyrate

丁酸橙花酯和丁酸香叶酯互为顺反异构体，均具有特殊的香气，其主要用途是调配玫瑰、金合欢、天竺葵、铃兰、香叶、熏衣草等花精油。丁酸橙花酯、丁酸香叶酯的合成，在香料工业上是由橙花醇、香叶醇和丁酸在浓硫酸存在下直接酯化反应制取，或者在吡啶存在下，使橙花醇、香..

Molecule Structure and Properties of Dehydroabietylamine

基于Hartree-Fock法对脱氢枞胺构型进行几何优化确定。将计算的结构参数与参照体系的单晶衍射数据进行比较,并将计算得到的红外参数值和核磁共振氢谱分别与实测的FT-IR和H-NMR结果进行拟合,发现理论计算值和实验测定值基本一致,同时得出一些相应的热力学参数理论值。研究表明,用计算化学方法对松香类化合物进行模拟研究是可行的,也为实验室研究松香类化合物提供理论依据。The geometries optimization of dehydroabietylamine configuration were finished to determine the configuration by the Hartree-Fock theory and caculated structure parameter was compared with consulting system single crystal diffraction data. The caculated infra-red parameter value and nuclear magnetic resonance hydrogen spectrum were matched with FT-IR and H-NMR resuits, it found that the calculation results were approximately coincident with that of experiments determining values. The corresponding thermodynamic parameters theory values were also obtained. The simulation research on rosin type of compound was feasible with calculation chemical method, it also provided the theory basis for research on rosin type of compound in laboratory.国家自然科学基金(20761002);教育部科学技术重点项目(205121);国家民委项目(07GX11);广西科学基金项目(桂科青0481034);广西高校人才小高地科研基金项目;广西化工研究院横向项目;广西林产化学品开发与利用重点实验室开放基

Fingerprint of alkaloid in Evodia rutaecarpa （Juss.） Benth. by HPLC

目的研究中药吴茱萸中生物碱类成分的HPLC特征指纹图谱。方法应用HPLC法分析吴茱萸药材生物碱类成分色谱图。色谱柱:Agilent Extend C18柱(250 mm×4.6 mm,5μm);流动相:乙腈-水系(水-四氢呋喃-乙酸,体积比48∶1∶0.1);洗脱方式:线性梯度洗脱;柱温:35℃;流速:1 mL.min-1;检测波长:240 nm;进样量:20μL。理论板数按吴茱萸次碱计算不低于3 000。结果10批不同来源的吴茱萸药材所含生物碱类成分均得到很好的分离,获得14个共有特征峰。结论HPLC指纹图谱法能较好地识别吴茱萸药材,为吴茱萸的质量控制提供了方法学依据。 Objective To study the HPLC fingerprints of alkaloid in Evodia rutaecarpa （Juss.） Benth.and establish HPLC standard fingerprints chromatogram. Methods Chromatographic method of alkaloid in Evodia rutaecarpa （Juss.） Benth. was established by using HPLC. Results Fingerprints consisted of 14 common characteristic peaks in 10 samples from different areas. Conclusions This method is accurate, reliable and provides a scientific basis for the control of the quality of Evodia rutaecarpa （Juss.） Benth

Theoretical Investigation on Structure and Property of Abietic Acids in Rosin

采用从头算Hartree-Fock和密度泛函DFT方法对松香枞酸分子的几何构型进行理论计算,按最低能量原理确定其最稳定的构型。对该稳定构型的结构参数与文献报道的理论计算值和试验测定值进行分析比较,发现3种理论方法中DFT-B3LYP算法更加精确,与实际测量值的误差更小,更加适合用于对此类化合物的分析与预测。同时用B3LYP泛函在6-31 +G**机组水平对松香的几种主要树脂酸进行能量分析,预测其稳定性并得到相应的热力学参数。结果表明:计算化学方法也是科学研究的一种有用工具,精确的理论计算能够获得实验室难于得到的重要的化学与物理信息,理论计算也可作为研究该类体系的一种新方法。The geometry of abietic acid has been investigated by several theoretical methods including the Hartree-Fock and DFF-B3LYP level of ab initio theory. Its most stable structure is determined by the minimum energy. Comparing with the known experimental results, DFT-B3LYP which has the smallest error in three theoretical methods is the best one for analysis and predication of these systems. In the mean time, the relative energies of four resin acids in rosin were analysized by the B3LYP/ 6-31 ＋ G＊＊ calculations. The calculation results predicted their stability and thermodynamic properties such as their values of Gibbs free energy, thermal enthalpies, thermal capacity and entropy. This research also shows that chemical calculations can be an important tool in scientific study. Accurate theoretical calculations can provide ways to obtain important chemical and physical information that cannot be easily obtained by experimental approaches. Clearly theoretical calculation gives a new method to investigate these systems.国家自然科学基金(20761002);教育部科学技术重点项目(205121);国家民委项目(07GX11);广西科学基金项目(桂科青0481034);广西高校人才小高地科研基金项目;广西化工研究院横向项目;广西林产化学品开发与利用重点试验室开放基

民族院校有机化学教学改革实践与研究

有机化学是一门重要的基础课,其精品课程建设是提高教学质量和培养人才的关键。为了提高民族院校有机化学教学质量,培养学生具有创新能力,我们从教学内容、教学方法与手段等方面对有机化学教学进行了改革探讨,取得了良好的教学效果。广西民族大学基础教学示范中心教育科学专项研究课题资