硫代甲酸糠酯的合成研究

本文以甲酸乙酐混和物与糠硫醇反应，合成了较高产率的硫代甲酸糠酯，并对产品进行了结构鉴定和评香鉴定。     

硫代二甘醇二豆蔻酸酯的合成及其性能研究

以硫代二甘醇和豆蔻酸为原料,选用活性炭负载对甲苯磺酸为催化剂,二甲苯为带水剂,合成了抗氧剂硫代二甘醇二豆蔻酸酯.适宜工艺条件为:反应温度170～180℃,醇酸摩尔比为1.5:1、催化剂用量为反应物总质量的1.0%、带水剂二甲苯用量30 mL、反应时间2 h.此工艺条件下硫代二甘醇二豆蔻酸酯的产率为97.3%.将产物应用于聚丙烯中,具有良好的抗氧化性能,并测试了熔体流动速率、拉伸强度、断裂伸长率和冲击强度.     

一锅法合成肼基二硫代甲酸苄酯的研究

利用一锅法合成标题化合物,并考察了溶剂浓度、物料配比、反应温度、反应时间及不同卤代烃对标题化合物产率的影响,将其产率由经典方法的30%～50%提高到90%以上。     

异丙醇溶剂中O-异丙基-S-十二烷基二硫代甲酸酯的合成工艺

首先采用粉碱、二硫化碳在过量的异丙醇溶剂体系中合成了异丙基黄原酸盐.所得产物不经分离直接加入溴代十二烷合成O-异丙基-S-十二烷基二硫代甲酸酯(DIDTC).实验考察了异丙醇用量、物料比例、反应时间和温度对产物收率的影响,并且研究了反应过程中溶剂异丙醇的回收循环利用.结果表明,在黄药与溴代十二烷物质的量比为1.05:1...     

二硫代肼基甲酸配合物及其席夫碱衍生物的合成

合成了二硫代肼基甲酸镉与镍的配合物以及由二硫代肼甲酸与环己酮１，４－双（２’－甲酰基苯基）－１，４－二氧杂丁烷缩合的两种新的含硫席夫碱衍生物，所有化合物都进行了表征，确定了它们的组成，且对两种席夫碱衍生物的性质进行了初步研究。     

9-二硫代芳甲酸酯基芴的合成

以9-溴芴和卤代芳烃为原料,首次经由格氏反应合成了5种有望做为可逆加成-断裂链转移试剂的双硫酯类化合物,并用1HNMR、13CNMR、IR、MS和元素分析对所得化合物结构进行了表征。     

润滑油添加剂二丁基二硫代氨基甲酸钼的合成

以钼酸钠 ,二正丁胺 ,二硫化碳为原料 ,合成了二丁基二硫代氨基甲酸钼 ,优化了合成反应条件 ,并对产品进行了红外光谱分析、熔点测定和钼含量分析。     

二烷基二硫代氨基甲酸镉的合成及应用研究

合成了润滑油添加剂二戊基二硫代氨基甲酸镉,利用四球试验机研究了其在矿物基础油中的极压、抗磨性能,以及与二烷基二硫代磷酸锌(T202)有机硼酸酯和磷酸三苯酯添加剂之间的抗磨协同性能。结果表明,此添加剂体现出了较好的抗磨性能和承载能力,并且与两种硼酸酯都体现出了良好的抗磨协同性能。另外,通过箱热氧化试验简单评价了其抗氧化性能,结果表明,该添加剂具有良好的高温抗氧化性能。     

二戊基二硫代氨基甲酸锌的制备

介绍了三种合成二戊基二硫代氨基甲酸锌的方法,并对其进行了比较,认为第三种方法一直接法为最可和的合成方法。同时,对典型的二戊基二硫代氨基甲酸锌产品的重要理化指标进行了介绍。     

水杨醛缩肼基二硫代甲酸苄酯类Schiff碱配体的合成

由水合肼、CS2与取代的溴化苄在低温条件下反应,合成肼基二硫代甲酸苄酯类化合物,再在无水乙醇体系中及高温回流条件下与取代的水杨醛进行反应,合成了一系列标题化合物,其结构经质谱、紫外光谱、红外光谱、元素分析及1H核磁共振等进行表征.     

Synthesis of estolide esters from cis-9-octadecenoic acid estolides

Oleic acid (cis-9-octadecenoic acid) was converted in excellent yield to the estolide, which was then esterified with 2,2-dimethypropan-1-ol (neopentyl alcohol), cis-9-octadence-1-ol (oleyl alcohol), and 2-propanol to generate the corresponding estolide esters. Higher-formula mass estolide esters were synthesized by reaction of the parent estolide with 1,3-propanediol, 2,2-dimethyl-1,3-propanediol, and 1,5-pentanediol to give the corresponding diesters of oleic estolide, thus doubling the molecular size of the parent estolide. Pour points and viscosities were determined in order to evaluate these products for possible industrial application.     

荧光环氧琥珀酸共聚物的合成及性能研究

以2-氨基噻唑和自制的环氧琥珀酸盐（ESA）为原料合成了含荧光标记的环氧琥珀酸共聚物,研究了产物的荧光性能和阻垢、缓蚀性能。实验表明,该荧光标记聚合物的荧光强度与其浓度呈一定的线性关系;在浓度为20 mg/L的条件下,该聚合物的阻垢率达到85%,缓蚀率为56.18%。     

Enzymatic synthesis of monosaccharide fatty acid esters and their comparison with conventional products

5-O-Acyl-1,2-O-isopropylidene-D-xylofuranose and 6-O-acyl1,2∶3,4-di-O-isopropylidene-D-galactopyranose were enzymatically prepared from the corresponding monosaccharide acetals and commercial (crude) fatty acid mixtures. Subsequent acid-catalyzed hydrolysis of the isopropylidene group(s) gave monosaccharide esters with overall yields of 59–88%, where the monoester content was at least 80% (galactose oleate) and typically 90% for the other preparations. In contrast to sugar fatty acid esters prepared by conventional, high-temperature (trans)esterification, the enzymatically obtained monosaccharide esters contained no appreciable quantities of undersirable side products, and the only contaminants were monosaccharides and fatty acids.     

柠檬酸硬脂酸单甘脂的合成研究

通过对柠檬酸硬脂酸单甘脂的合成研究 ,确定了以乙酸为催化剂兼溶剂 ,柠檬酸与硬脂酸单甘脂进行酯化反应的最佳工艺路线。结果表明 ,在此工艺路线下的最佳工艺条件为 :柠檬酸与硬脂酸单甘脂的摩尔比为 2∶1,乙酸用量为 10 0 % (以硬脂酸单甘脂质量计 ) ,反应温度为 12 0℃ ,酯化反应时间 3h ,真空度为 0 9MPa。该产品可作为食品乳化剂 ,在食品工业中有广泛的应用前景     

酒石酸衍生手性荧光聚合物的合成及表征

以对映纯酒石酸为碳源,在油酸介质中通过溶剂热法一步合成了荧光聚合物。制备的荧光聚合物水溶性好、发光稳定,未经钝化处理荧光量子产率可达4.02%。圆二色光谱分析表明,荧光聚合物具有手性特征。利用元素分析、光电子能谱、质谱等对手性荧光聚合物进行了表征。荧光聚合物的合成方法简单方便,易放大,产率高。     

脂肪酸酯的技术与市场发展动向

论述了脂肪酸一元醇酯,多元醇酯的特性、合成及用途,并介绍了由脂肪酸酯开发“绿色”表面活性剂的最新技术动向。     

Synthesis of glycidyl esters

A novel method of synthesis of glycidyl carboxylates (2,3‐epoxypropyl carboxylates, RCOOCH₂CH‐CH₂O) has been developed by carrying out the reaction of epichlorhydrin with a carboxylic acid in the presence of chromium acetate catalyst and subsequent dehydrochlorination of the resulting mixture of chlorohydrin esters followed by their separation. © 1999 Society of Chemical Industry     

羧酸酯加氢金属催化剂研究进展

羧酸酯通过催化加氢可以制备高附加值的醇、醛和酸,该类反应得到了广泛地研究.回顾了羧酸酯催化加氢所使用的金属催化剂,重点讨论了铜基催化剂、锰氧化物催化剂、贵金属铑、钌、铂和钯催化剂在羧酸酯加氢反应中的应用,并对羧酸酯加氢反应中环境友好的新型催化剂进行了展望.     

Enzymatic synthesis of wax esters from rapeseed fatty acid methyl esters and a fatty alcohol

Wax esters were transesterified from fatty acid methyl esters of rapeseed and a fatty alcohol (1-hexadecanol, 16:0). The amounts of both the substrates were fixed to 0.1 mmol and an immobilized enzyme, Lipozyme, was used as catalyst. The experiment was performed following a statistic central composite design with five variables. The enzyme/lipid ratio was varied between 0.3–0.9 of the substrate weight and the enzyme was equilibrated to different water activities varying from 0.11 to 0.44. A temperature range of 50–80°C was investigated and the reaction time lasted up to 40 min. A solvent, isooctane, constituted 0–30% of the substrate weight. The first experimental series was performed in small closed test tubes. In the second series the caps of the test tubes were off to evaporate the methanol produced during the reaction. The highest initial reaction rate was 9.6 g_{wax esters}/g_enzyme · h. It appeared when: the enzyme/lipid ratio was low, 0.3, the temperature was high, 80°C; no isooctane was present; and the water activity was below 0.11. The initial reaction rate was independent of the caps on the test tubes. With the large amount of enzyme the yield of wax esters was above 70% after 10 min in both experimental series. In the reaction with caps, the reaction reached equilibrium at 83% after 20 min at 80°C. However, without caps the continuous evaporation of methanol increased the equilibrium constantly, and after 40 min at 80°C a yield of 90% was reached.     

萘修饰的树枝形聚酰胺-胺的合成与荧光性质研究

在DMF溶剂中使用不同代数的整代树枝形聚合物聚酰胺-胺(PAMAM)与1,8-萘二甲酸酐进行酰胺化反应,制备了1,8-萘酰亚胺修饰的3.0G以及5.0G的树枝形聚合物D3、D5。对产物进行红外、紫外-可见吸收、荧光发射、激发光谱以及元素分析的表征,产物与目标产物结构一致。在氯仿与乙醇(体积比为1∶1)的混合溶剂中,由于PAMAM对萘环的固定作用,在萘环浓度相同的情况下,1,8-萘二甲酸酐不形成激发态萘环与基态萘环的激基缔合物,而聚合物D形成了分子内萘环的激基缔合物,在471 nm处产生萘环激基缔合物的荧光发射峰,具有潜在的应用价值。