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2-氨基-5-硝基苯酚经乙酰化、醚化及还原反应得3-乙氧基-4-乙酰胺基苯胺,与2-氰基-3-乙氧基丙烯酸乙酯反应后闭环,经三氯氧磷氯代后与3-氯-4-氟苯胺反应得3-氰基-4-(3-氯-4-氟苯胺基)-6-乙酰胺基-7-乙氧基喹啉,去乙酰保护基后与4-N,N-二甲胺基巴豆酰氯经酰化反应制得抗肿瘤药pelitinib,总收率约5%. 相似文献
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目的: 研究盐酸普拉克索的合成工艺。方法: 对乙酰氨基环己醇经Jones试剂氧化制得对乙酰氨基环己酮,经溴素溴化后与硫脲环合得到2-氨基-6-乙酰氨基-4,5,6,7-四氢苯并噻唑,再经浓盐酸水解、拆分、丙酰化和还原等反应制得抗帕金森氏症药物普拉克索。结果与结论:目标化合物的结构经1H-NMR、MS等确证。总收率达12%(以4-乙酰氨基环己醇计)。改进后的路线成本下降,操作简单,易于工业化生产。 相似文献
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固体光气与D(-)-α-(4-乙基-2,3-双氧代哌嗪-1-甲酰胺基)对羟基苯乙酸反应制得D(-)-α-(4-乙基-2,3-双氧代哌嗪-1-甲酰胺基)对羟基苯乙酰氯,结构经1H-NMR、IR确证;采用新型催化剂三氟化硼乙腈络合物催化7-ACA与1-甲基-5-巯基四氮唑反应制得7-氨基-3-[5-(1-甲基-1,2,3,4-四氮唑基)硫甲基]-△-3-头孢-4-羧酸盐酸盐后,再与D(-)-α-(4-乙基-2,3-双氧代哌嗪-1-甲酰胺基)对羟基苯乙酰氯进行反应制得头孢哌酮,产物结构与文献报道一致.反应总收率为58.30%. 相似文献
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17-(5′-异唑基)雄甾-4,16-二烯-3-酮(4,L-39)是最有希望的P45017α和5α-还原酶的双重抑制剂,对前列腺癌及前列腺肥大具有潜在的治疗作用.对其合成路线进行改进,收率极大提高.首先,Claisen缩合物2用羟胺在乙醇中环和得到纯5′-异唑3a,用Swern氧化反应直接氧化3a,然后在在酸中异构化后得到L-39(4).或者,化合物2在无水甲酸中与羟胺环和得到3-甲酯物(6),后者以改良奥氏氧化法直接氧化生成4-烯-3-酮物(4). 相似文献
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对三苄糖苷(1)的合成工艺进行了改进。1,2-O-异亚丙基-α-D-呋喃葡萄糖苷(2)在氢氧化钠/DMSO条件下,与氯化苄反应得3,5,6-三苄基-1,2-O-异亚丙基-α-D-呋喃葡萄糖苷(3)。3不经纯化,在乙酸/硫酸条件下水解后,经2次重结晶得到3,5,6-三苄基-D-呋喃葡萄糖苷(4),4在三氟乙酸/原甲酸三乙酯条件下与乙醇成苷制得1,纯度99.57%,总收率66%(以2计)。改进后的工艺反应条件温和,操作简便,已经过中试验证。 相似文献
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本研究对抗肿瘤药瑞戈非尼(1)的合成工艺进行优化。4-氯吡啶-2-甲酸甲酯(3)与甲胺反应得4-氯-N-甲基吡啶-2-甲酰胺(4)。以四丁基溴化铵为催化剂,4与4-氨基-3-氟苯酚(5)在二(口恶)烷中反应得4-(4-氨基-3-氟苯氧基)-N-甲基吡啶-2-甲酰胺(6)。三光气与4-氯-3-三氟甲基苯胺(7)在甲苯和吡啶中反应得4-氯-3-(三氟甲基)苯异氰酸酯(8)。6与8在乙酸乙酯中缩合得瑞戈非尼无水物(2),2在氯化氢的乙酸乙酯溶液作用下成盐酸盐,再在丙酮/水中加入碳酸氢钠转化为1,纯度99.8%。优化后的工艺反应条件温和,操作简单,总收率65%(以3计),较适合工业生产。 相似文献
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本研究改进了抗病毒药盐酸利匹韦林(1)的合成工艺。甲酰乙酸乙酯(2)和S-甲基异硫脲(3)反应得2-甲硫基-4-羟基嘧啶(4)。在甲磺酸催化下,4与4-氨基苄腈(5)在乙二醇二甲醚中反应得到4-[(4-羟基嘧啶-2-基)氨基]苄腈(6),反应温度由200℃降至110~120℃。6与溴化氢/乙酸溶液反应得到4-[(4-溴嘧啶-2-基)氨基]苄腈(7)。用乙酸钯和三(邻甲基苯)膦代替10%钯炭作为催化剂,4-溴-2,6-二甲基苯胺(8)与丙烯腈(9)反应得到(E)-3-(4-氨基-3,5-二甲基苯基)丙烯腈(10),其顺式异构体含量由20%降至0.60%,后处理时用重结晶代替柱色谱分离纯化,收率由48%提高至87%。7和10在缚酸剂1,1,3,3-四甲基胍(TMG)的作用下发生缩合反应,再与草酸成盐、纯化得到1,纯度99.92%,1顺式异构体的含量降至0.08%。优化后的工艺操作简便,总收率52%(以2计)。 相似文献
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Oxazolidinedione Dervatives and 4-(4-Piperidyl)phenazones as Potential Anti-inflammatory Agents N-Acyl dervatives ( 1 , R3 = arylsulfonyl or aroyl) can be prepared by treating 5,5-disubstituted 2,4-oxazolidinediones with acyl chlorides in the presence of equivalent amounts of aluminium chloride in pyridine/acetonitrile (1:1). Yields are high and there are no by-products (diarylsulphones or aroyl anhydrides). 5-Methyl-2,4-oxazolidinedione, but not 5-phenyl-24-oxazolidinedione, can be acylated under these conditions. 5-Phenyl-2,4-oxazolidinedione is pyridylated at C-5 to give 4 , Phenazone can be pyridylated in the absence of AlCl3 but in the presence of chloroformates to give compounds 6 , which can be reduced to give 4-(4-piperidyl)phenazones. 相似文献
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B el-Sayed Bayoumy 《Acta poloniae pharmaceutica》1991,48(1-2):13-18
p-Acetylphenyl thiosemicarbazide (I) was reacted with different aldehydes yielding the corresponding semicarbazones II. Addition condensation of thioglycolic acid with compounds II gave 4-thiazolidinones III. Reaction of compounds III with conc. H2SO4, KI/I2-NaOH and NaOH afforded the cyclized products (IV-VI). Compounds (IV-VI) reacted with semicarbazide to give the corresponding semicarbazones (VII-IX) which either were oxidized with selenium dioxide or thionyl chloride to give 1,2,3-selenadiazoles (X-XII) and 1,2,3-thiadiazoles (XIII-XV) respectively. Some of the prepared compounds were tested against some strains of bacteria. 相似文献
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The Synthesis of 4a-(3′,4′-Dimethoxyphenyl)-7-hydroxydecahydroquinoline 4-(3′,4′-Dimethoxyphenyl)-4-acetyl-pimelonitrile ( 1 ) cyclises in sulphuric acid to give the unsaturated lactam-ketone 2 , which, after hydrogenation to the dihydro-derivative 3 , is converted in one step to the title compound by reaction with triethyloxonium fluoroborate/sodium borohydride. 相似文献
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Isopropyl-alkylamines 2 react with 2,3-dichloro-1,4-naphthoquinone (1) to give red 2-chloro-3-isopropyl-alkylamino-1,4-naphthoquinones 3 and with 2,3-dichloro-1,4-naphthoquinone/acetaldehyde to give blue 2-chloro-3-isopropylalkylamino-vinyl-1,4-naphthoquinones 7. It is evident that the formation of 7 is preferred sterically to the formation of 3. The reaction between 2, 1 and acetaldehyde give also red aminoquinones 3 and blue green 2-chloro-3-(4-isopropylalkylamino-buta-1,3-dienyl)-1,4-naphthoquinone like 11. 相似文献
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Ulf Pindur 《Archiv der Pharmazie》1979,312(7):615-619
Reaction of Tryptamine with 4-Dimethylaminobenzaldehyde Depending on the reaction conditions, tryptamine ( 1 ) and 4-dimethylaminobenzaldehyde ( 2 ) yield either the 1,2,3,4-tetrahydro-β-carbolin 4a , the azomethin 4b or the diindolylmethane 4c . Compound 4a reacts with 2 in hydrogen chloride/methanol to give the isomeric O-methylbenzhydrol ethers 5a and the diindolylmethanes 5b . 相似文献