共查询到20条相似文献,搜索用时 62 毫秒
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《精细化工原料及中间体》2020,(8)
正本发明涉及化工合成技术领域,具体公开一种4-(4-甲酰基苯氧基)苯甲醛的制备方法。所述制备方法首先采用4-羟基苯甲醛与碳酸钾在阻聚剂和抗氧剂存在的条件下反应生成钾盐,通过共沸回流脱除反应生成的水,然后再将脱除水的钾盐与4-氟苯甲醛反应,制得4-(4-甲酰基苯氧基)苯甲醛产品。本发明制得的4-(4-甲酰基苯氧基)苯甲醛产品 相似文献
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以无水三氯化铝(AlCl3)为催化剂,对氯苯甲酰氯和苯甲醚为起始原料,经过Friedel-Crafts酰基化反应、去甲基反应、水解反应等过程合成了4-羟基-4'-氯二苯甲酮。考察了催化剂用量、苯甲醚用量、反应温度、反应时间等对产率的影响,得到了较适宜的工艺条件为对氯苯甲酰氯30 g,苯甲醚18 g,三氯化铝33 g,溶剂氯苯80 g,反应温度130℃,回流时间1.5 h,产率97.1%。改进后的方法能节约试剂,节省时间,减少污染。 相似文献
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以吲哚-4-甲醛、对甲基苯肼和对氯苯胺为原料,合成了1-(4-甲苯基)-3-(4-吲哚基)-5-(4-氯苯基)甲臢。经红外、核磁和质谱等波谱鉴定了目标分子的结构,并测定了它的氧化还原电位值。 相似文献
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在氮气保护下,以二苯胺、对碘苯甲醚和对甲氧基氯苄为原料,经过改良的Ullmann反应、Vilsmeier-Haack反应和Wittig反应,最终合成了电荷传输材料1-(4-甲氧基)苯基-2-[4′-(4″-甲氧基)三苯胺基]-乙烯,并优化了反应条件。该合成工艺具有反应温度低、反应时间短、操作简单的优点。 相似文献
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4-(4-氯苯基)环己醇及4-(4-氯苯基)环己酮的合成研究 总被引:1,自引:0,他引:1
以氯苯、环己烯、乙酰氯为原料,通过Friedel-Crafts反应、Baeyer-Villiger反应、水解反应得到4-(4-氯苯基)环己醇。通过正交试验得到Friedel-Crafts反应和Baeyer-Villiger反应优化后的工艺条件。4-(4-氯苯基)环己醇总收率达12.9%,较文献收率提高了6%以上。所得醇经次氯酸钠氧化,得到4-(4-氯苯基)环己酮,氧化收率87%,产品的结构经1HNMR、GC-MS鉴定。 相似文献
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2-氟-4-溴甲苯、2-氟-4-溴苄基溴的合成与研究 总被引:2,自引:0,他引:2
2-氟-4-溴甲苯(简称BFT)、2-氟-4-溴苄基溴(简称BFBB)是合成医药FK-366的一种重要中间体,本文介绍了BFT和BFBB的合成路线,研究结果表明该路线适用于工业化大生产。 相似文献
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1.85 A structure of anti-fluorescein 4-4-20 Fab 总被引:1,自引:0,他引:1
Whitlow Marc; Howard Andrew J.; Wood Jay F.; Voss Edward W. Jr; Hardman Karl D. 《Protein engineering, design & selection : PEDS》1995,8(8):749-761
The crystal complex of fluorescein bound to the high-affinityanti-fluorescein 4-4-20 Fab {Ka = 1010 M1 at 2°C)has been determined at 1.85 Å. Isomorphous crystals oftwo isoelectric forms (p1 = 7.5 and 7.9) of the antifluorescein4-4-20 Fab, an IgG2A [Gibson et al (1988)Proteins: Struct. FunctGenet., 3, 155160], have been grown. Both complexes crystallizewith one molecule in the asymmetric unit in space group P1,with a = 42.75 Å, b =43.87 Å, c = 58.17 Å, = 95.15° , ß = 86.85° and = 98.01°.The final structure has an R value of 0.188 at 1.85 Åresolution. Interactions between bound fluorescein, the complementarity-determiningregions (CDRs) of the Fab and the active-site mutants of the4-4-20 single-chain Fv will be discussed. Differences were foundbetween the structure reported here and the previously reported2.7 Å 4-4-20 Fab structure [Herron et al. (1989) Proteins:Struct. Fund., 5, 271280]. Our structure determinationwas based on 26 328 unique reflections four times theamount of data used in the previous report. Differences in thetwo structures could be explained by differences in interpretingthe electron density maps at the various resolutions. The r.m.s.deviations between the variable and constant domains of thetwo structures were 0.77 and 1.54 Å, respectively. Fourregions of the light chain and four regions of the heavy chainhad r.m.s. backbone deviations of >4 Å. The most significantof these was the conformation of the light chain CDR 1. 相似文献
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M Yarim M Koksal I Durmaz R Atalay 《International journal of molecular sciences》2012,13(7):8071-8085
A series of novel 1-(4-substitutedbenzoyl)-4-(4-chlorobenzhydryl)piperazine derivatives 5a-g was designed by a nucleophilic substitution reaction of 1-(4-chlorobenzhydryl)piperazine with various benzoyl chlorides and characterized by elemental analyses, IR and (1)H nuclear magnetic resonance spectra. Cytotoxicity of the compounds was demonstrated on cancer cell lines from liver (HUH7, FOCUS, MAHLAVU, HEPG2, HEP3B), breast (MCF7, BT20, T47D, CAMA-1), colon (HCT-116), gastric (KATO-3) and endometrial (MFE-296) cancer cell lines. Time-dependent cytotoxicity analysis of compound 5a indicated the long-term in situ stability of this compound. All compounds showed significant cell growth inhibitory activity on the selected cancer cell lines. 相似文献
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对农药杀菌剂-环唑醇制备中的重要的中间体4-(4-氯苯基)-1-丁烯-4-醇的六种合成方法作了介绍,从中寻找出较合理的工艺路线. 相似文献