(2S,3R)-1-二甲氨基-3-(3-甲氧基苯基)-2-甲基戊-3-醇的合成工艺研究

目的 对(2S,3R)- 1-二甲氨基-3-(3-甲氧基苯基)-2-甲基戊-3-醇合成工艺进行研究.方法 以3-戊酮为起始原料,经Mannich反应、手性拆分、Grignard反应等步骤合成(2S,3R)-1-二甲氨基-3-(3-甲氧基苯基)-2-甲基戊-3-醇,并对化学拆分进行工艺优化.结果 合成(2S,3R)-1...     

(2R,3S)-2-[(R)-1-[3,5-二(三氟甲基)苯基]乙氧基]-3-(4-氟苯基)吗啉盐酸盐的合成

对甲氧基苯甲醛(3)和2-氨基乙醇进行还原胺化反应得2-(4-甲氧基苄胺基)乙醇(4),4和乙醛酸经成环反应得2-羟基-4-对甲氧基苄基吗啉-3-酮(5),5和三氟乙酐反应得6后与(R)-1-[3,5-二(三氟甲基)苯基]乙醇(7)缩合,再经结晶诱导不对称转化、格氏反应、氢化脱保护及成盐反应制得阿瑞吡坦关键中间体(2R,3S)-2-[(R)-1-[3,5-二(三氟甲基)苯基]乙氧基]-3-(4-氟苯基)吗啉盐酸盐,总收率约18%(以3计)。     

1,3-双-[2-(3-氨基苯基)咪唑-1-基甲基]苯的合成

间硝基苯甲腈与乙二胺进行缩合反应生成2-(3-硝基苯基)咪唑啉,继以活性二氧化锰氧化生成2-(3-硝基苯基)咪唑.该咪唑与间-二(溴甲基)苯进行烷基化反应生成1,3-双[2-(3-硝基苯基)咪唑-1-基甲基]苯,再以水合肼还原生成目标化合物.     

2-(3-氰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯的合成

目的优化非布司他关键中间体2-(3-氰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯(4)的合成方法。方法采用"一勺烩"方法,以4-羟基苯甲腈为起始原料,首先与硫氢化钠和无水氯化镁在N,N-二甲基甲酰胺中反应,所得中间体不经分离,直接加入2-氯乙酰乙酸乙酯进行环合反应,得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯(2);然后通过六亚甲基四胺/三氟乙酸进行Duff反应,得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯(3);再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。结果经四步反应合成非布司他关键中间体4,总收率为22.6%,其结构经核磁共振氢谱、质谱确证。结论改进后的工艺终产品无需柱色谱纯化,适合工业化生产。     

2-[(吡啶-4-基)甲基氨基]-N-[4-(三氟甲基)苯基]苯甲酰胺的合成工艺研究

目的合成2-[(吡啶-4-基)甲基氨基]-N-[4-(三氟甲基)苯基]苯甲酰胺(Ⅰ)。方法以邻硝基苯甲酸为起始原料,经氯代、氨解、水合肼还原、缩合、硼氢化钠还原共5步反应合成得到目标化合物Ⅰ。结果与结论经5步反应合成了目标化合物Ⅰ,其结构经核磁共振氢谱、质谱确证。改进后的合成工艺反应条件温和,操作简便,收率可达54.5%。     

瑞格列奈关键中间体(S)-(+)-3-甲基-1-[2-(1-哌啶基)苯基]丁胺的合成

目的研究合成非磺酰脲类促胰岛素分泌剂瑞格列奈的关键中间体(S)-(+)-3-甲基-1-[2-(1-哌啶基)苯基]丁胺的合成工艺。方法以邻氟苯甲醛(1)为起始原料,首先与盐酸羟胺反应生成邻氟苯甲醛肟(2),再经脱水生成邻氟苯腈(3),然后与哌啶进行胺解反应生成邻哌啶基苯腈(4),再与溴代异丁基镁进行格氏反应生成亚胺衍生物(5),最后经硼氢化钠还原生成消旋伯胺(6),经与N-乙酰-L-谷氨酸成盐、拆分、氢氧化钠水解得到目标产物S-(6)。结果以邻氟苯甲醛为起始原料,经6步反应合成了(S)-(+)-3-甲基-1-[2-(1-哌啶基)苯基]丁胺,总收率达15.4%,目标产物结构经ESI-MS、1H-NMR确证。结论本合成方法原料易得,反应条件温和,适合大规模制备。     

2,2-二甲基-4-(2,5-二氟苯基)-5-[(4-氨基磺酰基)苯基]-3(2H)-呋喃酮的合成

用2,5-二氟苯乙酸与茴香硫醚经傅-克反应、与3-溴-3-甲基-2-氧代丁腈成环及硝酸氧化制得2,2-二甲基-4-(2,5-二氟苯基)-5-[(4-甲磺酰基)苯基]-3(2H)-呋喃酮(7),7与乙酐反应后再经过硫酸氢钾复合盐氧化、氢氧化钠水解得4-[2,2-二甲基-3-氧代-4-(2,5-二氟苯基)-3(2H)-呋喃-5-基]苯磺酸钠(9),最后依次与磺酰氯和氨水反应制得2,2-二甲基-4-(2,5-二氟苯基)-5-[(4-氨基磺酰基)苯基]-3(2H)-呋喃酮,总收率约46％.     

前列腺癌显像剂~(18)F-8-乙氧基-2-(4-氟苯基)-3-硝基-2H-色烯的合成

目的制备前列腺癌显像剂~(18)F-8-乙氧基-2-(4-氟苯基)-3-硝基-2H-色烯的前体8-乙氧基-2-(4-N,N,N-三甲基氨基苯基)-3-硝基-2H-色烯季胺三氟甲磺酸盐;用前体和放射性核素~(18)F合成~(18)F-8-乙氧基-2-(4-氟苯基)-3-硝基-2H-色烯。方法以2-羟基-1-乙氧基-3-醛基苯为起始原料,经烯化、环化、磺化、成盐反应得到标记前体8-乙氧基-2-(4-N,N,N-三甲基氨基苯基)-3-硝基-2H-色烯季胺三氟甲磺酸盐;然后与放射性核素~(18)F经亲核氟代反应,得到~(18)F-8-乙氧基-2-(4-氟苯基)-3-硝基-2H-色烯。标记前体8-乙氧基-2-(4-N,N,N-三甲基氨基苯基)-3-硝基-2H-色烯季胺三氟甲磺酸盐及各步反应中间体的结构均经核磁共振谱和质谱确证。结果与结论成功合成前列腺癌诊断显影剂~(18)F-8-乙氧基-2-(4-氟苯基)-3-硝基-2H-色烯,标记率为(25.8±2.6)%(n=5,未经衰减校正),TLC测定其放化纯度(RCP)为97.5%,为进一步临床研究奠定了基础。     

(E)-3-(4-羟基-2-甲氧基苯基)丙烯酸甲酯的合成

4-羟基-2-甲氧基苯甲醛和丙二酸在吡啶和苯胺催化下,经Knoevenagel缩合反应制得(E)-3-(4-羟基-2-甲氧基苯基)丙烯酸,再在1-(3-二甲胺基丙基)-3-乙基碳二亚胺盐酸盐和4-二甲胺基吡啶作用下与甲醇成酯制得(E)-3-(4-羟基-2-甲氧基苯基)丙烯酸甲酯,总收率为58.5％.     

N-(4-氯-3-甲基苯基)-N′-甲基脲的合成

用铁粉还原、水汽蒸馏的方法制得4－氯－3－甲基苯胺，再以1，2，4－三氯苯为溶剂，与N－甲基脲直接缩合合成N－（4－氯－3－甲基苯基）－N′-甲基脲，该新方法优化了反应条件，可获得60％及67％的转化率和收率，且未反应的原料可回收套用。     

Synthesis, antitubercular, antifungal and antibacterial activities of 6-substituted phenyl-2-(3'-substituted phenyl pyridazin-6'-yl)-2,3,4,5-tetrahydropyridazin-3-one

A series of 6-substituted phenyl-2-(3'-substituted phenyl pyridazin-6'-yl)-2,3,4,5-tetrahydropyridazin-3-ones has been synthesized. An appropriate aromatic hydrocarbon reacts with succinic anhydride in presence of AlCl3 to yield beta-aroyl propionic acid. The corresponding acid was cyclized with hydrazine hydrate to give 6-(substituted aryl)-2,3,4,5-tetrahydro-3-pyridazinone, which was heated on steam bath with phosphorus(V) oxychloride to yield 3-chloro 6-substituted phenyl pyridazine. This intermediate after reaction with hydrazine hydrate was converted into 3-hydrazino-6-substituted phenyl pyridazine. The resulting product was converted into 6-substituted phenyl-2-(3'-substituted phenyl pyridazin-6'-yl)-2,3,4,5-tetrahydropyridazin-3-one by reacting with substituted aroyl propionic acid. Spectral data (IR, NMR, mass spectra) confirmed the structures of the synthesized compounds. The synthesized compounds were investigated for their in vitro antitubercular, antifungal and antibacterial activities. The results indicated that the synthesized compounds have mild to potent activities with reference to their appropriate reference standards.     

Synthesis of (2E)-2-methyl-3-(4-([4-(quinolin-2-ylmethoxy)phenyl]sulfanyl)phenyl)prop-2-enoic acid (VUFB 20609) and 2-methyl-3-(4-([4-(quinolin-2-ylmethoxy)phenyl]sulfanyl)phenyl)propanoic acid (VUFB 20584) as potential antileukotrienic agents

The syntheses of (2E)-2-methyl-3-(4-([4-(quinolin-2-ylmethoxy)phenyl]sulfanyl)phenyl) prop-2-enoic acid (VUFB 20609) and racemic 2-methyl-3-(4-([4-(quinolin-2-ylmethoxy) phenyl]sulfanyl)phenyl)propanoic acid (VUFB 20584) as new potential antileukotrienic drugs are described. Due to a low reactivity of the 4-substituted aryl bromides (coupling of the 4-substituted aryl bromides do not provide an activating functional group with 4-methoxybenzene-1-thiol), special conditions, in particular specific heterogeneous copper catalysts, were used. Catalytic hydrogenation of the conjugated double bond on Pd/C in the presence of the sulfanyl group is discussed. In-vitro cytotoxicity testing was performed using a microplate colorimetric acid phosphatase assay. Antiplatelet activity was evaluated using an in-vitro test in human platelet-rich plasma. Some substances inhibited arachidonic acid-induced platelet aggregation.     

3-Carboxy-5-methyl-N-[4-(trifluoromethyl)phenyl]-4-isoxazolecarboxamide, a new prodrug for the antiarthritic agent 2-cyano-3-hydroxy-N-[4-(trifluoromethyl)phenyl]-2-butenamide.

The title compound 3-carboxyisoxazole 3 was synthesized by cycloaddition of carbethoxyformonitrile oxide to N-[4-(trifluoromethyl)phenyl]-3-pyrrolidino-2-butenamide (6) with spontaneous elimination of pyrrolidine followed by hydrolysis of the ethyl ester. Compound 3 was shown to be absorbed intact after oral administration to rats. Over 24 h, the compound was metabolized to yield plasma concentrations of the antiinflammatory agent 2-cyano-3-hydroxy-N-[4-(trifluoromethyl)phenyl]-2-butenamide (2), similar to those obtained following an equivalent dose of the established prodrug of 5-methyl-N-[4-(trifluoromethyl)phenyl]isoxazole-4-carboxamide (1).     

3-(4-甲磺酰基)苯基-2-环己基-2-丁烯酸-γ-内酯的合成

目的设计并合成了标题化合物。方法以对甲磺酰基苯乙酮为原料，经溴代、缩合和环合三步反应合成了产物。结果总收率为82．5％，中间体和产物经核磁共振谱和质谱确证。结论成功地合成了设计的化合物，而且摸索了反应条件．使反应具有时间短，收率高等优点。     

Synthesis and antimicrobial activity of some 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-4-bromo-2-pyrazolines and 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-2-pyrazolin-4-ones

A series of 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-2-pyrazolin-4-ones (4a-e) have been synthesized by the oxidation of 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-4-bromo-2-pyrazolines (3a-e) with dimethylsulfoxide. The structure has been established on the basis of spectral data (IR,1H NMR). The synthesized compounds have been screened in vitro for their possible antimicrobial activity.     

Biologically active N-Mannich bases of isatin-3-(phenyl)-imines (author's transl)

By the condensation of isatin and 5-nitroisatin with substituted aromatic amines, isatin- and 5-nitroisatin-3-(phenyl)-imines (azomethines) are formed which are converted into N-Mannich-bases by aminomethylation and may be formulated as azomethines with E configuration. A biotest of Lepidium sativum L. was used to prove mitodepressive properties. Some compounds showed a significant growth-inhibiting activity. It was found that a change in activity is produced by condensation on the carbon atom in position 3 and by aminomethylation on the nitrogen atom in the isatin nucleus.     

3-(3′-甲基-4′-取代苯基-1′,3′-丁二烯基)吲哚类衍生物的合成及其抗癌活性

目的　研究3-(3′-甲基-4′-取代苯基-1′,3′-丁二烯基)吲哚类衍生物的合成及其抗癌活性。方法　通过亲电取代、羟醛缩合、选择性还原、相转移Wittig反应和水解反应合成目的化合物,利用几种药理模型进行抗癌和抗炎活性筛选。结果　设计合成了11个3-(3′-甲基-4′-取代苯基-1′,3′-丁二烯基)吲哚化合物,均为新化合物。生物活性实验结果表明,化合物8对HL-60,HCT-8和Bel7402癌细胞株有效,且在浓度为10^-5mol·L^-1时,其抗炎抑制率可达100％。结论　化合物8显示了抑癌作用和抗炎活性,值得进一步研究。     

The antioxidant and membrane-stabilizing properties of 1-(4-substituted phenyl)-2h-(phenyl)-3-aminopropan-1-ol hydrochlorides in vitro

In vitro model systems were used to study the antioxidant and membrane-stabilizing properties of 1-(4-substituted phenyl)-2H-(phenyl)-3-aminopropan-1-ol hydrochlorides. These secondary aminopropanols, whose synthesis is first reported here, were found not to have any significant antioxidant or antiradical activity either in an ascorbate-dependent Fe(II)-stimulated peroxidation system, in a method based on the spectrophotometric monitoring of decreases in the concentration of the stable radical 1,1-diphenyl-2-picrylhydrazyl, or in the photochemiluminescence analysis method. However these compounds had marked antihemolytic effects in an erythrocyte oxidative stress model. It is suggested that the new 1-(4-substituted phenyl)-2H-(phenyl)-3-aminopropan-1-ol hydrochlorides are biologically active compounds with weak antioxidant properties, capable of membrane-stabilizing actions due to interaction with the structural components of cell membranes.     

3-取代苯基苯并吡喃酮类化合物 的设计合成及抗肿瘤活性

目的 在7-甲氧基或7-羟基苯并吡喃酮的3位引入各种取代苯基,以发现抗肿瘤活性更强的异黄酮类化合物。方法 以丹皮酚和甲酸乙酯为原料,经多步反应制得关键中间体3-碘-7-甲氧基苯并吡喃酮(5),再经Suzuki coupling反应制得目标化合物,通过1H-NMR、MS和IR方法确定目标化合物的结构,部分化合物还进行了13C-NMR测定。选择人结肠癌细胞株HCT116和人肝癌细胞株7721为试验瘤株,以姜黄素和大豆异黄酮为阳性对照测定体外抗肿瘤活性。结果 设计合成的20个新目标化合物均有一定的体外抗肿瘤活性,其中化合物6, 9, 16和19的活性较好,与对照品姜黄素的IC50值相当, 明显优于对照品大豆异黄酮的IC50值。结论 可以通过引入不同的3-取代苯基改变异黄酮类化合物的抗肿瘤活性;在这类化合物的3位苯基上引入甲基、甲氧基或三氟甲基体积较小的基团似乎有利于其抗肿瘤活性。 关键词：化学合成; 苯并吡喃酮; Suzuki coupling偶联反应; 抗肿瘤活性