二(2-氧代-5,5-二甲基-1,3-二氧杂-2-磷杂环己基)氧化磷的合成

合成了二（２－氧代－５,５－二甲基－１,３－二氧杂－２－磷杂环己基）氧化磷,用元素分析、ＩＲ、＾１ＨＮＭＲ和ＭＳ等分析方法表征了它的组成和结构,解释了其谱图现象。     

1,4-二(5,5-二甲基-1,3-二氧-2-磷环己基膦酰基)哌嗪的合成研究

以新戊二醇、三氯氧磷、哌嗪为原料,用酐法合成了无卤膨胀型阻燃剂1,4-二(5,5-二甲基-1,3-二氧-2-磷环己基膦酰基)哌嗪,得出其最佳工艺条件为新戊二醇磷酸酐和哌嗪的摩尔比为1∶1,以二甲苯做溶剂,在140℃下回流分水反应8h,产率达91.6%。并用红外、核磁对结构进行了表征。     

新型磷—氮阻燃剂三(5,5-二甲基-1,3-二氧-2-磷杂环己烷-2-氧甲基)胺的合成及应用

叙述了三（５,５ 二甲基 １,３ 二氧 ２ 磷杂环己烷 ２ 氧甲基）胺的合成方法。用元素分析、ＩＲ、１ＨＮＭＲ验证了化合物的结构,分析了除水剂、催化剂等反应条件对反应结果的影响。在聚氨酯软泡中的应用表明,该阻燃剂具有良好的阻燃性     

1,4-二(5,5-二甲基-1,3-二氧杂己内磷酰亚胺基)苯的合成

对以新戊二醇、三氯氧磷和对苯二胺为原料,在三乙胺和４ Ｎ,Ｎ 二甲胺基吡啶（ＤＭＡＰ）催化作用下合成１,４ 二（５,５ 二甲基 １,３ 二氧杂己内磷酰亚胺基）苯（ＮＢＰＡＮ）的反应进行了研究。讨论了ＤＭＡＰ对该反应的作用机制,合成收率达８２．７％。并用元素分析、ＩＲ和１ＨＮＭＲ表征了产物的结构。热重分析表明ＮＢＰＡＮ的起始分解温度为２８０℃,并在２８０～３１０℃迅速炭化,成炭率达３５．５８％。     

5,5-二甲基-1,3,2-二氧磷杂环戊烷-2-氧的制备研究

对以新戊二醇、三氯化磷为原料合成亚磷酸酯5,5-二甲基-1,3,2-二氧磷杂环戊烷-2-氧的合成反应进行了研究,用三种不同的方法合成了该亚磷酸酯,并对三种合成方法进行了比较和评述.     

2-氯-5-氯甲基吡啶在不同溶剂中溶解度的测定与关联(英文)

2-Chloro-5-chloromethylpyridine is a crucial intermediate of pesticides. Its solid-liquid equilibrium data will provide essential support for industrial design and further theoretical studies. The solubilities of 2-chloro-5-chloromethylpyridine in water, methanol, ethanol, ethyl acetate, acetone, trichloromethane and toluene at different temperatures were measured using the synthetic method by a laser monitoring observation technique. The solubility data were correlated with the modified Apelblat equation and Wilson equation. The calculated values were in good agreement with the experimental values.     

1,3-二(5,5-二甲基-1,3-二氧杂己内磷酰氧基)苯合成方法的改进

以新戊二醇、三氯氧磷和间苯二酚为原料,三乙胺为缚酸剂从另外一条路线合成了1,3-二(5,5-二甲基-1,3-二氧杂己内磷酰氧基)苯,即新戊二醇先与三氯氧磷反应制得新戊二醇磷酰氯,再以该磷酰氯与间苯二酚反应制得目标产物。其适宜的反应条件为:n(新戊二醇磷酰氯)∶n(间苯二酚)∶n(三乙胺)=2∶1∶4,回流温度(~64℃)下反应时间为4 h,以间苯二酚计的目标产物收率为66.2%。产物结构通过IR、NMR分析进行了确认。与1998年的5 852 197号美国专利方法相比,该法降低了原料三氯氧磷的用量,省去了蒸馏过量三氯氧磷的操作,收率提高了20.9%。     

新型单组分磷溴协效阻燃剂1,3-二(5,5-二溴甲基-1,3-二氧杂己内磷酰氧基)苯的合成

以二溴新戊二醇与三氯氧磷为原料,三乙胺为催化剂,合成得到5,5-二溴甲基-1,3-二氧杂己内磷酰氯,再与间苯二酚反应得到标题化合物,两步反应总产率76.9%。目标产物结构经元素分析、IR、MS及1HNMR证实。热失重分析表明,目标产物具有较高的热稳定性和良好的成炭性,起始分解温度为301.0℃,500℃时炭残余量达32.52%。     

(S)-(+)-2,2-二甲基环丙烷甲酰胺在不同溶剂中溶解度的测定与关联

（S）-（＋）-2,2-dimethylcyclopropane carbox amide is a key intermediate of Cilastatin, an inhibitor of dehydropeptidase-I. Its corresponding solid-liquid equilibrium data will provide essential support for industrial design and further theoretical studies. The solubilities of （S）-（＋）-2,2-dimethylcyclopropane carbox amide in toluene, dichloromethane, trichloromethane, ethyl acetate, ethanol and pure water at different temperature were measured using the synthetic method by a laser monitoring observation technique. The solubility data were correlated with the modified Apelblat equation.The calculated values were good in agreement with the experimental values.     

磷-氮系膨胀型阻燃剂1,2-二(2-氧代-5,5-二甲基-1,3-二氧-2-磷杂环己基-2-亚氨基)乙烷及其同系物的合成

以三氯氧磷、乙二胺、新戊二醇或二溴新戊二醇为原料合成了两种磷氮系阻燃剂１,２－二（２－氧代－５,５－二甲基－１,３－二氧－２－磷杂环己基－２－亚氨基）乙烷和１,２－二（２－氧代－５,５－二溴甲基－１,３－二氧－２－磷杂环己基－２－亚氨基）乙烷,产品经ＩＲ、１ＨＮＭＲ和元素分析确定。同时研究了反应溶剂、反应温度和催化剂对产物收率的影响     

辣椒碱在不同溶剂中溶解度的测定与关联

应用平衡法,以辣椒碱晶体(含辣椒碱50.4%,二氢辣椒碱37.1%,降二氢辣椒碱7.9%)为原料,在262~333 K温度下测定了辣椒碱在甲醇、乙醇、正丁醇等9种溶剂中的溶解度曲线,分别采用理想溶液模型、Apelblat模型和多项式经验方程对实验数据进行关联. 结果表明,9种溶剂中,辣椒碱的溶解度均随温度升高而增大,辣椒碱在正丁醇中的溶解度最大,在水中的溶解度最小. 计算表明,乙醚适合作为辣椒碱的冷却结晶溶剂,产率为51.23%. 模型关联结果为理想溶液模型的误差较大,多项式经验方程的误差最小.     

间苯二甲腈在四种溶剂中溶解度的测定及关联

采用平衡法分别测定了间苯二甲腈在甲醇、甲苯、二甲苯和苯胺四种溶剂中的溶解度,温度范围为293.15~318.15 K,并分别采用λ-h方程、Apelblat模型和Yaws模型对实验数据进行了关联。根据实验数据可以看出间苯二甲腈的溶解度在4种溶剂中均随着温度的升高而升高,并且间苯二甲腈在不同溶剂中的溶解度差别较大。通过4个体系的24个数据点的实验值与计算值相比较,三种模型的总的平均相对误差分别为5.92%、3.90%、3.86%。结果表明λ-h方程、Apelblat模型和Yaws模型都可以较好地关联间苯二甲腈在四种溶剂中的溶解度数据。     

对羟基苯甘氨酸硫酸盐在水-丙酮中溶解度的测定与关联

利用灵敏的激光监视装置,采用恒温溶解法测定了对羟基苯甘氨酸硫酸盐在水-丙酮二元混合溶剂中的溶解度.实验温度范围约为303～323 K,水-丙酮混合溶剂中水的变化范围为0%～100%.在纯丙酮和低含水量的混合溶剂中,对羟基苯甘氨酸硫酸盐溶解度很低.混合溶剂含水9.09%以下时,溶解度随水含量增加略有降低.随着溶剂中水量的进一步增加,溶解度随之增大.在研究的温度范围内,溶质在纯水中的溶解度约为纯丙酮中的50～70倍.同一溶剂中,溶解度随温度升高而增大.用从Clausius-Clapeyron方程推导的理论模型关联溶解度与温度的关系,计算的溶解度和实验值符合良好,平均相对误差1.73%.实验结果可应用于对羟基苯甘氨酸的提纯和优先结晶法拆分工艺.     

Measurement and correlation for solubility of diosgenin in some mixed solvents简

The solubility data of diosgenin in mixed systems of ethanol ＋ 1-propanol （1 ： 1）, ethanol ＋ 1-butanol （1 ： 1）, ethanol ＋ isobutyl alcohol （1 ： 1）, methanol ＋ isobutyl alcohol （1 ： 1）, methanol ＋ isobutyl alcohol （1 ： 4）, ethanol ＋ 1-pentanol （1 ： 1） and carbon tetrachloride were measured over the temperature range from 289.15 K to 334.15 K by a laser monitoring observation technique at atmospheric pressure, with all mixtures mixed by volume ratio. The Apelblat equation, the ideal solution model, and the 2h equation are used to correlate the solubility data. The results show that the three models agree well with the experimental data, providing essential support for industrial design and further theoretical study.     

Solubility of CO2 in Methanol, 1-Octyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide, and Their Mixtures

Solubility data of carbon dioxide (CO₂) (1) in methanol (2), 1-octyl-3-methylimidazolium bis(trifluoro- methylsulfonyl)imide ([omim]⁺[Tf₂N]^-) (3), and their mixtures (w₃ 0.2, 0.5, and 0.8) at temperatures 313.2 and 333.2 K and pressures up to 7.0 MPa were measured by a high-pressure view-cell technique. The solubility of CO₂ in methanol (w₃=0), [omim]⁺[Tf₂N]^- (w₃=1.0) and their mixtures follows the order of (w₃=0)<(w₃=0.2)< (w₃=0.5)<(w₃=0.8)<(w₃=1.0) at the same temperature and pressure, while the magnitude of Henry's constants follows the reverse order at a given temperature, which is consistent with the COSMO-RS (conductor-like screening for real solvents) calculation. The solubility data of CO₂ in methanol and [omim]⁺[Tf₂N]^- are correlated with the Peng-Robinson equation of state, and the solubility of CO₂ in the mixtures of methanol and [omim]⁺[Tf₂N]^- can be well predicted based on the mole fraction average of methanol and [omim]⁺[Tf₂N]^- over the solubility of CO₂ in pure methanol and [omim]⁺[Tf₂N]^-. The mixtures of methanol and [omim]⁺[Tf2N]^- may be used as physical solvents for capturing CO₂ with high partial pressures since they combine the advantages of organic solvents and ionic liquids.     

Measurement and Correlation for Solubility of (S)-(+)-2,2-Dimethyl-cyclopropane Carbox Amide in Different Solvents

1 INTRODUCTION (S)-(+)-2,2-dimethylcyclopropane carbox amide [(+)-DMCPCA, Fig.1] is a key intermediate of Cilas- tatin, an inhibitor of dehydropeptidase-I. As the syner- gist of imipenem (an antibiotic drug), cilastatin is widely used in clinical applications and has prosper- ous prospects[1]. In industrial manufacture[2―6], as the optical intermediate, the chemical and optical purity of (+)-DMCPCA would affect the quality of cilastatin. So, the separation and purification are impo…     

Modified Correlation for Low-Density Polyethylene (LDPE) Solubility in Several Organic Solvents

Theoretical Foundations of Chemical Engineering - A nonideal solubility equation is developed based on crystallinity and is applied to model the solid-liquid equilibrium for crystalline low-density...     

1-甲基-3-(3-丙磺酸基)咪唑硫酸氢盐在一些溶剂中的溶解度(英文)

Ionic liquid 1-methyl-3-(3-sulfopropyl)-imidazolium hydrogen sulfate ([C3SO3HMIM][HSO4]) was synthesized and characterized by infrared spectroscopy (IR), nuclear magnetic resonance (1H and 13C NMR) and ultraviolet-visible (UV-Vis) spectra. Its thermal stability was also examined by thermogravimetric analysis (TGA) and a differential scanning calorimeter (DSC). The mole fraction solubilities of [C3SO3HMIM][HSO4]) in 12 selected solvents (n-pentane, n-hexane, n-heptane, benzene, toluene, ethylbenzene, acetone, 2-butanone, 3-methyl-2-butanone, tetrahydrofuran, ethyl acetate and dichloromethane) in the temperature range from 289.15 to 363.15 K were measured using a static analytical method and correlated with an empirical equation.     

3-(2-芳基-3-乙酰基-1,3,4-噁二唑啉-5-基)-1,1-二甲基- 1,2,5,.6-四氢吡啶碘化物的制备及结构确证

报道了烟酰肼与取代芳醛反应生成相应的烟酰芳腙在醋酐催化下生成2芳基－3－乙酰基－5－（吡啶－3－基）－1,3,4恶二唑啉,不经分离直接与碘甲烷作用生成相应的季铵盐,接着用硼氢化钠还原季铵化物而得含四氢吡啶环和恶唑啉环的新化合物3－（2－芳基－3－乙酰基－1,3,4－恶二唑啉－5－基）－1,1－二甲基－1,2,5,6－四氢吡啶碘化物,其结构经IR,^1HNMR,MS和元素分析确诊。