5-(N-取代氨基)磺酰基-1-萘胺的合成

以5-氨基-1-荼磺酸为起始原料合成厂10个5-（N-取代氨基）磺酰基-1-萘胺化合物，其结构经质谱、红外光谱确证。     

硝唑尼特合成工艺的研究

由乙酰水杨酸和2-氨基-5-硝基噻唑为原料,选用N,N-二甲基甲酰胺和三乙胺分别作为催化剂和缚酸剂,经酰胺化反应生成一种抗寄生虫新药—硝唑尼特,其较佳的工艺条件:酰氯化反应温度70℃,氯化亚砜与乙酰水杨酸的摩尔比为1.3∶1,乙酰水杨酸与2-氨基-5-硝基噻唑的摩尔比为1.4∶1,酰胺化反应时间2.5 h,收率达76.8%。该工艺简单,收率高,具有较好的应用价值。     

4-氨基-5-乙磺酰基-2-甲氧基苯甲酸的合成

以对氨基水杨酸为起始原料,用硫酸二甲酯甲基化制得4-氨基-2-甲氧基苯甲酸甲酯;然后与溴素和硫氰酸钾反应制得4-氨基-2-甲氧基-5-氰硫基苯甲酸甲酯;再用溴乙烷在氢氧化钾催化下乙基化制得4-氨基-5-乙硫基-2-甲氧基苯甲酸;最后用双氧水氧化制得氨磺必利的中间体4-氨基-5-乙磺酰基-2-甲氧基苯甲酸,合成总收率为24.5%,目标物化学结构经IR、1HNMR、MS确证。     

N-（3-环己烯-1-基甲基）-4-氨基哌啶的合成

目的：合成强效的5-H1和5-H2受体拮抗剂西尼必利的关键中间体N-（3-环己烯-1-基甲基）-4-氨基哌啶。方法：以N-（3-环己烯-1-基甲基）-哌啶-4-肟为原料,经还原后生成N-（3-环己烯-1-基甲基）-4-氨基哌啶（1）。结果：目标化合物经质谱、核磁共振氢谱确证化学结构,产率达到76%。结论：文章为N-（3-环己烯-1-基甲基）-4-氨基哌啶的工业化生产提供了一条新型的、较为合理的工艺路线。     

2，5-二取代1，3，4-噻二唑的合成

以5-氨基-2-巯基-1,3,4-噻二唑为原料,经过胺基酰基化、氯气氧化制得5-乙酰胺基-1,3,4-噻二唑-2-磺酰氯,化合物与N-甲基哌嗪、苯胺反应,合成两个未见报道的目标产物:5-乙酰胺基-1,3,4-噻二唑-2-(N-甲基哌嗪磺酰胺)和5-乙酰胺基-1,3,4-噻二唑-2-(磺酰苯胺).利用IR、H-NMR、LC-MS对目标产物进行表征.     

NN-二（甲氧基羰基甲基）取代苯胺类染料中间体的合成研究

本文研究了使用带水剂分水促进N-烷基化反应合成N,N-二甲氧基羰基甲基取代苯胺类染料中间体的新工艺。以间氨基乙酰苯胺（或2-氨基-4-乙酰氨基苯甲醚,统称取代苯胺）和氯乙酸甲酯为原料,碳酸钠为缚酸剂,溴化钠为催化剂,采用带水剂合成3-乙酰氨基-N,N-二甲氧基羰基甲基苯胺（或2-甲氧基-5-乙酰氨基-N,N-二甲氧基羰基甲基苯胺）。确定其最佳工艺条件为：n（碳酸钠）∶n（取代苯胺）=1.2∶1,催化剂溴化钠量为取代苯胺（质量分数）的10%,0.5 mol取代苯胺投料,取100g甲苯作为带水剂,回收带水剂（含氯乙酸甲酯）可用于下批合成（即套用）。     

1-氮基-5-苯甲酰氮基蒽醌合成工艺优化

以1,5-二氨基葸醌为原料,与苯甲酰氯反应,以苯甲酸甲酯为溶剂,以碳酸钠作缚酸剂,制得1-氨基-5-苯甲酰氨基蒽醌,并对合成工艺进行了优化。优化条件为：n（苯甲酰氯）：n（1,5-二氨基蒽醌）=1．4：1,反应温度140℃,保温2h。在此条件下,目标产物收率比原工艺提高13％。采用熔点测定、红外光谱（IR）、液相色谱（HLPC）进行分析和结构表征。     

N-苄基苦参醇桂皮酸酯的合成

目的：合成N-苄基苦参醇桂皮酸酯并优化其合成工艺。方法：以苦参碱为原料,通过碱水解开环,氯苄苄基化得到N-苄基苦参酸苄酯,再经四氢铝锂还原得到N-苄基苦参醇,最后在EDAC脱水剂作用下与桂皮酸缩合,得到目标物N-苄基苦参醇桂皮酸酯。结论：设计合成的N-苄基苦参醇桂皮酸酯收率达60.2%,产物的化学结构经TLC、IR、MS、1H-NMR等确证。     

2-甲基-5-羟乙基氨基苯酚的合成工艺研究

以5-氨基-2-甲基苯酚为起始原料,采用氯甲酸氯乙酯作为羟乙基化试剂,经羟乙基化、环化、水解反应合成目标化合物2-甲基-5-(N-羟乙基)氨基苯酚。产品结构经过红外光谱、核磁共振氢谱、质谱分析验证。该方法反应选择性高、收率高、易分离提纯、易操作。     

头孢替安中间体N,N-二甲基氨基乙基-5-巯基-四氮唑的合成研究

N,N-二甲基氨基乙基-5-巯基-四氮唑（DMMT）为合成头孢替安的关键中间体。N,N-二甲基乙二胺与CS2加成后,不经巯基保护,直接与NaN3闭环合成得到产品,总收率达到75.4%。对实验条件进行了优化。     

5-氨基水杨酸-聚乙二醇高分子前药的制备及其释放行为

用羧基活化法,以聚乙二醇(PEG)、丁二酸酐为原料,制备了5-氨基水杨酸(5-ASA)的高分子前药.傅立叶红外分析表明5-ASA已经成功与PEG共价键连接,水溶性实验表明前药的水溶性比5-ASA的明显增大.对高分子前药在磷酸缓冲溶液中进行释放研究,结果表明:pH值为2.0和5.4时5-ASA的释放量较少;而pH值为7.2时,5-ASA的释放速度相对较快且释放量较大.     

杂多酸(盐)催化合成肉桂酸异戊酯的研究

以杂多酸（盐）为催化剂,３Ａ分子筛为脱水剂,肉桂酸和异戊醇为原料合成肉桂酸异戊酯,考察了醇酸比、催化剂种类、催化剂用量、反应时间对酯产率的影响。结果表明,在肉桂酸用量为０１ｍｏｌ情况下,用ＡｌＰＷ１２Ｏ４０为催化剂,催化剂用量为１００ｇ,醇酸摩尔比为２５∶１,反应时间３ｈ,反应温度１３５～１４０℃是最适宜的反应条件。酯产率超过９６％。     

Application of 2-hydroxyethyl methacrylate polymers in controlled release of 5-aminosalicylic acid as a colon-specific drug

Acrylic type polymeric systems having degradable ester bonds linked to 5-aminosalicylic acid were synthesized and evaluated as materials for drug delivery. 5-Aminosalicylic acid, as an important drug in the treatment of inflammatory bowel diseases, was linked to 2-hydroxyethyl methacrylate by activated ester methodology in two-step and one-pot procedures to obtain methacryloyloxyethyl 5-amino salicylate. The resulting methacrylic derivative of 5-aminosalicylic acid was copolymerized with methacrylamide, 2-hydroxyethyl methacrylate and methyl methacrylate (in 1:3 mole ratio) by free radical polymerization method in N,N-dimethylformamide solution, utilizing α,ά-azoisobutyronitrile as initiator at the temperature range of 65–70 °C. The obtained polymers were characterized by FT-IR, ¹H NMR, ¹³C NMR and elemental analysis. The average molecular weights of the polymers bearing drug units as side substituents of the acrylic backbone were determined by gel permeation chromatography and their polydispersity indices resulted in the range of 1.6–1.8. Release studies of 5-aminosalicylic acid were performed into dialysis bags by hydrolysis in buffered solutions (pH 1, 7 and 8) at 37 °C. Detection of hydrolysis by UV spectroscopy at selected intervals showed that the drug can be released by selective hydrolysis of the ester bond at the side of drug moiety. The release profiles indicated that the hydrolytic behavior of polymeric prodrugs is strongly based on the polymer hydrophilicity and the pH value of the hydrolysis solution. The results suggest that these systems could be useful for preparation of a controlled release formulation of 5-aminosalicylic acid in colon.     

Shellac-polyamidoamine: Design of a new polymeric carrier material for controlled release application

The development of a pH sensitive, biodegradable polymer from the combination of Shellac (a natural polymer secreted by lac insect) and polyamidoamine (PAA) (a synthetic polymer) yielded a new biocompatible polymer Shellac-PAA in a photopolymerization process. Scanning electron micrograph of Shellac-PAA shows an interesting heterogeneous surface morphology supported with observation of two different melting temperatures obtained from differential scanning calorimetric measurement. The equilibrium swelling properties of the polymeric material was studied as a function of pH and time in buffer solutions similar to that of gastric and intestinal fluids. The controlled release kinetics of a model colon specific drug 5-aminosalicylic acid showed Fickian diffusion behavior. The new polymer is biocompatible, biodegradable and, hence, projected as a new kind of polymer with improved properties, which can be a potential candidate for controlled release of therapeutic agents in colon specific diseases. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

固体酸Fe_2O_3/SO_4~(2-)催化合成肉桂酸丁酯的研究

研究了用Fe2O3/SO42-作为催化剂,使肉桂酸与正丁醇发生酯化反应合成肉桂酸丁酯。获得最佳的反应条件为正丁醇与肉桂酸的摩尔比为2∶1,反应1.5 h,反应温度为130℃,催化剂0.8 g/0.5 mol酸,收率可达98.7%以上。     

柱前衍生化高效液相色谱法测定美沙拉嗪肠溶片中5-ASA的含量

采用RP-HPLC测定美沙拉嗪肠溶片中5-氨基水杨酸（5-ASA）的含量。柱前衍生化使样品中5-ASA乙酰化,采用反相高效液相色谱法,色谱柱为ODS C18,流动相为磷酸盐缓冲液-乙腈（92∶8）,流速为0.9 m L·min-1,检测波长为304 nm。结果表明,5-ASA在3.12~50.0μg·m L-1范围内线性关系良好（r=0.999 6）,平均回收率为100.8%,RSD为1.27%,柱前衍生化高效液相色谱法测定美沙拉嗪肠溶片中5-ASA的含量简便、快速、准确、专属性强,适用于美沙拉嗪肠溶片中5-ASA的含量测定。     

甲基丙烯酰胺对氨基水杨酸功能单体的合成

以甲基丙烯酸酐和对氨基水杨酸为原料,制得甲基丙烯酰胺对氨基水杨酸。所得产物结构采用IR和¹H NMR进行表征。考察了反应温度、反应时间和原料配比对收率的影响。结果表明,最佳反应条件为：n(甲基丙烯酸酐)∶n(对氨基水杨酸)=0.559∶1,温度32 ℃,反应时间30 h,在此条件下,产物收率在88.89%左右。     

桂皮酸苦参碱的合成

目的：合成桂皮酸苦参碱并优化其合成工艺。方法：以苦参碱和桂皮酸为原料合成桂皮酸苦参碱。结果：桂皮酸苦参碱收率达90％,产物的化学结构经TLC、IR、MS等确证。结论：所设计的合成技术简单易行。     

Controlled drug release of 5-amino salicylic acid by poly(2-hydroxyethylmethacrylate) grafted agar

The utilization of poly (2-hydroxyethylmethacrylate) grafted agar (Ag-g-P(HEMA)) as a matrix for the controlled release of 5-aminosalicylic acid was investigated. Grafted copolymers of 2-hydroxyethylmethacrylate (HEMA) monomers on agar were synthesized by microwave assisted method. In vitro drug release studies were performed at pH values of 2 and 7 in order to investigate the possibility of pH triggered release for colon targeted drug delivery. Further, the percent grafting vs. t₅₀ (the time taken for release of 50% of the enclosed drug) value was studied and the results indicate that it may be possible to develop a programmable drug release matrix based on grafted polysaccharide. Ag-g-P(HEMA) appears to be a useful matrix for controlled release.     

A Novel Cinnamic Acid‐Based Organogel: Effect of Oil Type on Physical Characteristics and Crystallization Kinetics

Oil sources (canola, sunflower, and flax‐seed oil) characterized by unsaturated fatty acids are gelled by using cinnamic acid. The physical characteristics and crystallization kinetics of cinnamic acid‐based organogels are investigated. A phase diagram with cinnamic acid concentrations ranging from 1% to 7% (w/w) shows that both canola and sunflower oil organogels are formed at 3.0% (w/w) cinnamic acid at 5 °C. The flax‐seed oil organogels are formed at 4.0% (w/w) at 5 °C. Firmness is shown to be dependent on the fatty acid composition and viscosity of the oil. Flax‐seed oil with a higher degree of unsaturation and lower viscosity tends to produce harder organogels. This result is consistent with the observations of polarized light microscopy. The organogels have low solid fat content at 35 °C which is close to the human body temperature, and no effect of oil type is found. The X‐ray diffraction measurements show β'‐form crystal exists in three types of organogels. The thermal properties vary in different types of organogels. The crystallization kinetics results suggest that three types of organogels crystallize by 1D and 2D mixed growth and instantaneous nucleation. Practical Applications: These findings provide in‐depth characteristics of cinnamic acid‐based organogels, which are a substitute for solid fats.