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乙酰胺

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The results indicate that the optimized sulfonylation reaction time is 4 h, the materiel rate of chlorosulfonic acid and 2-chloroimidazo[1,2-α]pyridine is 1.2 : 1, with ethylamine the yield increasing from 15.4% to above 70%; the optimized ammonolysis reaction time is 3 h and the reaction temperature is 27℃, with the acetonitrile yield increasing from 60.1% to above 79.6%.

实验结果表明,磺酰化反应的最佳反应时间为4 h,氯磺酸与2-氯咪唑并[1,-α]吡啶的用量比为1.2:1,加入三乙胺可将收率由15.4%提高到70%以上;氨解反应的最佳反应时间为3 h,反应温度为27 ℃,加入乙腈可将收率由60.1%提高到79.6%;方案经改进后,总反应时间缩短3 h,收率提高了5.5%。

Acylamino acid-5-fluorouracil were prepared from acylamino acid chlorides and 5- fluorouracil in the presence of 〓.

邻苯二甲酰氨基酸酰-5-氟尿嘧啶则由邻苯二甲酰氨基酸酰氯与5-氟尿嘧啶在三乙胺的存在下制得。

Study on an efficient process for the preparation of trifloxystrobin starting from 2-methylacetophenone bypartial oxidation,esterification,reaction with methoxyamine,bromization and condensation with 3'- acetophenone oxime.

以邻甲基苯乙酮为原料,经过高锰酸钾的碱性氧化,甲醇酯化,再与甲氧基胺盐酸盐肟化后,用N-溴丁二酰亚胺溴化,最后和间三氟甲基苯乙酮肟缩合得到目标产物肟菌酯。

In this thesis,three copolymerization systems have been investigated in detail.They are α-ethylacrylic acid/maleimide,α- acrylic acid/maleimide and monomethyl itaconate/maleimide,respectively.

本文对α-乙基丙烯酸/马来酰亚胺、α-正丙基丙烯酸/马来酰亚胺和衣康酸单甲酯/马来酰亚胺三种新的共聚体系进行了详细地研究,并对合成共聚物的生理活性进行了初步探讨,实现了α-正丙基丙烯酸乙酯/马来酰亚胺体系的可控共聚反应。

Amino-monomethoxypoly(ethy1ene glycol)(mPEG-NH2) was synthesized based on the principle of Gabriel synthesis.Monomethoxypoly(ethy1ene glycol) tosylate was prepared at first,and then reaction with potassium salt of phthalimide as nucleophile to produce the monomethoxypoly(ethy1ene glycol)phthalimide derivative.

摘 要:首先合成了单甲氧基聚乙二醇对甲苯磺酸酯,然后根据盖布瑞尔合成法原理,以邻苯二甲酰亚胺钾盐为亲核试剂与mPEG-OTs反应,生成单甲氧基聚乙二醇的邻苯二甲酰亚胺衍生物,mPEG-PI与水合肼反应肼解生成伯胺,合成了一端为氨基的单甲氧基聚乙二醇(mPEG-NH2)。

Gabriel reaction was adopted to synthesis 2-(0ctahydro-1-azocinyl)ethylamine, N-(β-Heptamethyleniminoethy1)phthalimide was prepared by treating Heptamethylenimine with N -(β-bromoethy1) phthalimide. N -(β-bromoethy1) phthalimide was easily prepared from phthalic anhydride in two steps.

我们采用Gabriel伯胺合成法制备2-环庚亚胺基乙胺,从邻苯二甲酸酐经过两步反应很容易地得到N-邻苯二甲酰亚胺,然后与环庚亚胺发生亲核取代反应,产物再水解制得伯胺2-环庚亚胺基乙胺。

The hydrophobic core serves as a reservoir for water-insoluble drugs.Hence,these nanoparticles can be used as carriers for hydrophobic drugs.For the synthesis of cholesterol-modified glycol chitosan conjugates,a carboxyl group was initially introduced to cholesterol molecule using succinic anhydride,and then covalently coupled with the primary amino group of glycol chitosan in the presence of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride and N-hydroxyl succinimide.

本文采用二步反应将胆固醇接枝到乙二醇壳聚糖,首先将胆固醇进行羧基化,将胆固醇与琥珀酸酐反应生成胆固醇半琥珀酸酯,然后用1-乙基-3-(3-二甲基氨丙基)碳二亚胺盐酸盐与N-羟基琥珀酰亚胺作为偶联剂,将胆固醇半琥珀酸酯的羧基与乙二醇壳聚糖主链的氨基进行反应,得到胆固醇疏水改性乙二醇壳聚糖共聚物。

With land area of 2,800M2 and completed quality supervision test instrument, its annual sales amount reaches 30,000,000 RMB. Its main products, Succinimide,butanimide,2.5-diketopyrrolidine;N-bromobutanimide or N-bromosuccinimide;N- chlorosuccinimide (N-chlorobutanimide);Bromoacetonitrile,Bromomethyl cyanide; Quinoline;P-Bromophenol;4-Bromophenol;N.N'- dicyclohexylcarbodiimide;S-3-Hydroxy-γ-Butyrolactone;2.3-Dihydrofuran;Ammonia water, Ammonium hydroxide; sell well in the US, South Korea, Europe and other countries and are praised highly by all clients.

占地面积2800M2,年销售额3000万元,公司拥有完备的质量监测检验仪器和手段,主要产品有:琥珀酰亚胺、N-溴代琥珀酰亚胺、N-氯代琥珀酰亚胺、溴乙晴、喹啉(95%)、喹啉( 98%)、对溴苯酚、N.N'-二环已基碳化二亚胺、s-3-羟基-γ-丁内酯、2.3-二氢呋喃、氨水、氢氧化胺,产品远销美国、韩国、欧洲等国家和地区,深受用户青睐。

All of the tripodal schiff base ligands and their complexes were characterized.

以三乙醇胺、巯基苯胺、巯基乙胺为初始原料,设计合成了六个三脚架结构的化合物,其合成路线如下:三乙醇胺与氯化亚砜反应得到三(2-氯乙基)胺(1),然后与巯基苯胺或巯基乙胺在碱性条件下反应生成三脚架结构的三{[2-(2-氨基苯基)硫代]乙基}胺(2)或三{[2-(2-氨基乙基)硫代]乙基}胺(3),然后再与水杨醛、2-甲酰基-8-羟基喹啉(8)、2-甲酰基-8-苄氧基喹啉(7)反应得到六种新型的含硫西佛碱化合

In this thesis, the design, synthesis and application of substituted 1,8-naphthalimides and napthopyrones conjugated with uridine, substituted 1,3,5-triazine, 1,2-dibromoethane, ethyl bromoacetate have been studied.

本论文研究了取代l,8-萘酰亚胺和萘并吡喃酮与尿苷、取代均三嗪、二溴乙烷、溴乙酸乙酯偶合和双l,8-萘酰亚胺之间偶合的设计、合成及应用。

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昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

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