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以苯乙酮(对硝基苯乙酮)、硫脲和碘为原料合成了2-氨基-4-苯基噻唑和2-氨基-4-对硝基苯基噻唑。以α-卤代2,4-二氯苯乙酮和硫脲为原料合成了2-氨基-4(2,4-二氯苯基)噻唑。第二种合成方法反应简便,收率高。 相似文献
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以苯乙酮(对硝基苯乙酮)、硫脲和碘为原料合成了2-氨基-4-苯基噻唑和2-氨基-4-对硝基苯基噻唑。以α-卤代-2,4-二氯苯乙酮和硫脲为原料合成了2-氨基-4-(2,4-二氯苯基)噻唑。第二种合成方法反应简便,收率高 相似文献
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以间硝基苯胺为原料,经苯甲酰化、铁粉还原和羟乙基化等反应合成了3'-(双-2-羟乙基)氨基苯甲酰苯胺,并对反应的影响因素进行了讨论。 相似文献
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以对氯磷硝基苯胺、甲基丙烯酸为原料,二甲苯为溶剂,P20,为催化剂合成得到N-(4-氯-2-硝基苯基)-2-甲基丙烯酰胺,产率为62%。研究了反应物的物质的量比、催化剂用量和反应时间对合成N-(4-氯-2-硝基苯基)-2-甲基丙烯酰胺的影响,得到最佳反应条件。并对产品进行了IR和NMR的结构鉴定。 相似文献
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以顺丁烯二酸酐和对硝基苯胺为原料,经多步反应合成了4-硝基苯基马来酰亚胺(Ⅰ)与4-氨基苯基马来酰亚胺(Ⅱ)两种新型NPMI产品,并采用傅立叶红外光谱和核磁共振氢谱对其结构进行了确认。同时研究了反应物摩尔比、催化剂用量、胺化反应温度等因素对合成4-硝基苯基马来酰亚胺的影响,以及考察了氯化亚锡用量、催化还原温度、盐酸用量等对合成4-氨基苯基马来酰亚胺的影响。产物(Ⅰ)收率达85%以上,产物(Ⅱ)收率在50%左右。 相似文献
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荧烷系染料的合成研究 总被引:2,自引:0,他引:2
以间-甲酚为原料,经硝化,甲基化,还原,缩合等反应合成了4-甲氧基-2-甲基-N-苯基苯胺;并以间-二乙氨基苯酚为原料,与苯酐通过Friedel-Crafts反应,合成了2-羧基-4′-二乙氨基-2′-羟基二苯甲酮。在此基础上,合成了2-苯基-氨基-3-甲基-6-二乙氨基荧烷(ODB)等一系列荧烷系染料。所有结构都经过元素分析和′HNMR等谱图验证结构正确。 相似文献
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我国脂肪酸的生产和应用 总被引:3,自引:0,他引:3
陆蠡珠 《精细与专用化学品》2007,15(1):24-28
简要介绍脂肪酸的分类、原料来源、生产工艺、品种以及用途。并对我国脂肪酸的生产现状进行了分析。重点介绍了脂肪酸在我国橡胶工业中、塑料助剂等领域的应用,脂肪酸甲酯作为表面活性剂在不同领域的广泛应用,最后还简述了癸二酸和改性醇酸树脂应用。 相似文献
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酸液体系的研究现状分析和现场应用 总被引:1,自引:0,他引:1
酸化解堵与压裂改造相比,它具有施工相对简单和成本相对较低等特点,所以酸化解堵是一项各油田广泛使用的油气田增产技术。酸化解堵技术已有将近100历史,现已研制出具有不同特点的酸液体系,如乳化酸、泡沫酸、固体酸、多氢酸等,基本能满足复杂地质条件对酸液的要求。 相似文献
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介绍了磷钼杂多酸的合成。通过正交试验探讨了反应物料量比、三氧化钼浓度、反应温度和反应时间对产物产率的影响。结果表明,最适宜的反应条件为:反应物量比n(三氧化钼)∶n(磷酸)=12∶1.0、反应温度t=70℃、反应时间7 h、三氧化钼与水的质量比1∶8。经红外光谱分析及熔点测定确定所得产品为磷钼杂多酸化合物。并以磷钼杂多酸取代硫酸作催化剂制备乙酸乙醋来研究其催化活性,并与硫酸做催化剂进行对比实验收率为70.75%,超过硫酸催化剂水平。 相似文献
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The Growth‐Inhibiting Effects of Beef Fatty Acids on MCF‐7 Cells Are Influenced Mostly by the Depot Location and Inconsistently by the Biohydrogenation Intermediate Content 下载免费PDF全文
Payam Vahmani David C. Rolland Katherine E. Gzyl Danica D. S. Baines Michael E. R. Dugan 《Lipids》2018,53(7):699-708
Biohydrogenation intermediates (BHI) including conjugated linoleic acid (CLA) isomers are formed during ruminal biohydrogenation of polyunsaturated fatty acids (PUFA) in ruminants. Although many studies have examined the anticarcinogenic effects of CLA, few studies have reported the anticarcinogenic properties of BHI in their natural form found in dairy and beef fats. The present study compared the growth‐inhibitory effects of fatty acids from beef perirenal fat (PRF) or subcutaneous fat (SCF) with low or high levels of BHI in MCF‐7 human breast cancer cells. Cells were exposed for 72 h to media containing increasing doses (50 to 400 μM) of different beef fat treatments. Fatty‐acid analysis showed that BHI were readily incorporated into cell phospholipids (PL) in a treatment‐dependent manner, but higher BHI in PL did not consistently inhibit growth. Culturing with low‐BHI PRF or high‐BHI PRF did not lead to growth inhibition, but low‐BHI SCF inhibited growth, and inhibition was further increased by high‐BHI SCF. Other classes of fatty acids may, therefore, be interacting with BHI resulting in differential effects on growth inhibition in human breast cancer cells. 相似文献
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Claudio Guilherme Portela de Carvalho Matheus Felipe da Silva José Marcos Gontijo Mandarino Anna Karolina Grunvald Nilza Patrícia Ramos José Lopes Ribeiro Vicente de Paulo Campos Godinho 《Journal of the American Oil Chemists' Society》2018,95(1):61-67
This study aimed to evaluate the fatty acid profiles of sunflower oil extracted from hybrid grains produced and stored in different environments. The trials were conducted in Teresina (Piauí), Vilhena (Rondônia), and Jaguariúna (São Paulo) in randomized complete block design with 4 replicates. After harvesting, grains from 1 high oleic and 3 traditional hybrids were packed in kraft paper bags and stored in a covered shed and in a cold chamber up to 12 months. The fatty acid profiles were determined by gas chromatography after 0, 4, 8, and 12 months of storage. Analyses of variance were conducted in a split‐plot design, with hybrids being considered as whole plots and storage times as subplots. Tukey's test was performed to compare hybrids and regression analyses for storage times. The initial fatty acid profile of the grains of the same hybrid varied depending on the production location. The grain storage of high oleic and traditional sunflower hybrids during 12 months in covered shed and in cold chamber resulted in little changes in oil fatty acid profiles, regardless of the initial contents. These changes occurred only for linoleic and palmitic acids. 相似文献
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Claudio Guilherme Portela de Carvalho Luana Fernanda Mazzola José Marcos Gontijo Mandarino Flávio Carlos Dalchiavon José Lopes Ribeiro Aluisio Brigido Borba Filho Alberto Donizete Alves 《Journal of the American Oil Chemists' Society》2019,96(9):1019-1025
This study aimed to verify whether the fatty acid profiles of mid-oleic genotypes grown in the tropical region of Brazil fit the Codex Alimentarius and to examine the possibility of using traditional inbred lines to produce high-oleic hybrids. For this purpose, we assessed the fatty acid profile of six mid-oleic hybrids grown in environments with different minimum temperatures during oil formation in the achenes. The tests were conducted between 2015 and 2017 in an experimentally randomized complete block design with four replications. The oleic, linoleic, palmitic, and stearic acid contents were determined using gas chromatography. The mid-oleic hybrids presented varying levels of fatty acids, with oleic acid ranging between 43.6% and 84.6%, linoleic acid between 8.5% and 45.6%, palmitic acid between 3.9% and 5.7%, and stearic acid between 2.2% and 6.2%. Some of the fatty acid values were outside the ranges established by the CODEX STAN 210-1999 and were characteristic of high-oleic type sunflowers. This finding shows that we can take advantage of the potential of combining traditional inbred lines to produce high-oleic hybrids for faster and more economical breeding programs in these environments. 相似文献
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Claudio Guilherme Portela de Carvalho Luana Fernanda Mazzola Andressa Caldeira Flávio Carlos Dalchiavon José Marcos Gontijo Mandarino 《Journal of the American Oil Chemists' Society》2019,96(7):789-794
The objective of this work was to evaluate the quality of the oil extracted from sunflower achenes grown in Campo Novo de Parecis, the main producing region of Brazil, to optimize its use by the processing and food industries. In addition, the fatty acid profiles of the oil were checked for their adherence to the CODEX STAN 210–1999. Traditional and high-oleic genotypes were grown between 2014 and 2017 during trials with a randomized complete block experimental design with four replications. The contents of oleic, linoleic, palmitic, and stearic acids were determined using gas chromatography. The fatty acid profiles of traditional genotypes were observed to be outside the ranges established by the CODEX, with an oleic acid content above 39.4% and linoleic, palmitic, and stearic acid values lower than 48.3%, 2.7%, and 5.0%, respectively, as well as high-oleic sunflower oil with a stearic acid content of less than 2.6%. The availability of this information can, on the one hand, positively impact industries and encourage the use of better quality raw materials that are more technologically and nutritionally adequate. On the other hand, the commercialization of sunflower oil with a fatty acid profile outside the ranges established by CODEX can be difficult, because the contents are out of specification due to the climatic conditions in the cropping region. 相似文献
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丘宝增胡静怡汤吉海等 《化工时刊》2014,(2):1-4
采用廉价的浓硫酸为催化剂,氧气为自由基捕集剂,以十二酸为原料,经氯化合成α-氯代十二酸。系统考察了反应温度、催化剂用量、氯气流量、氧氯比、反应时间等因素的影响,得到最佳工艺条件:十二酸20 g,在反应温度135℃、催化剂10%、氯气流量50 mL·min-1、vO2/vCl2=1∶2、反应时间3 h,可实现十二酸基本完全转化,目标产物α-氯代十二酸选择性达到94.5%。 相似文献