4-(4-氨基苯基)-3-吗啉酮的合成

用两种方法制得抗凝剂利伐沙班的中间体4-(4-氨基苯基)-3-吗啉酮(1):①溴苯相继与乙醇胺、氯乙酰氯反应得4-苯基吗啉酮,再经硝化、还原生成1,总收率约32%;②溴苯先硝化,再与乙醇胺反应得到2-(4-硝基苯胺基)乙醇,再经氯乙酰氯闭环、还原反应制得1,总收率约47%.     

7-甲氧基-4-(2-甲基-4-喹唑啉基)-3,4-二氢喹噁啉-2(1H)-酮的合成工艺改进

目的:改进7-甲氧基-4-(2-甲基-4-喹唑啉基)-3,4-二氢喹噁啉-2(1H)-酮的合成工艺。方法:以2-甲基-4(3H)-喹唑啉酮为起始原料,通过氯代、亲核取代、二芳胺烷基化和硝基还原环合等反应对7-甲氧基-4-(2-甲基-4-喹唑啉基)-3,4-二氢喹噁啉-2(1H)-酮的合成工艺进行改进,并考察其收率。结果:7-甲氧基-4-(2-甲基-4-喹唑啉基)-3,4-二氢喹噁啉-2(1H)-酮的结构经核磁共振氢谱和电喷雾质谱确证,总收率为43.5%,较改进前的20.2%提高了23.3%。结论:改进后的工艺更简单,条件更温和,适合实验室研究的批量制备。     

Synthesis of ethyl 2-(4-chlorophenyl)-5-(2-furyl)-4-oxazoleacetate, a hypolipidemic agent, and related compounds

A series of 2-aryl and 2-alkyl derivatives of 5-furyl-4-oxazoleacetic acid and their homologues having alkyl groups at the alpha-position of the acids were synthesized and evaluated for their hypolipidemic activities in Sprague-Dawley rats. On the basis of the structure-activity relationships and subacute toxicities, ethyl 2-(4-chlorophenyl)-5-(2-furyl)-4-oxazoleacetate (35) was selected as a candidate compound for development. Compound 35 reduced serum cholesterol and triglyceride levels by 23% and 35%, respectively, at a dose of 0.05% in a diet in normal rats, and it was about 10 times more active in hereditary hyperlipidemic rats (THLR/1) than in normal rats. Compound 35 inhibited platelet aggregation in vitro and also normalized hyperaggregability of hyperlipidemic plasma platelet ex vivo.     

艾他培南关键中间体的合成

目的改进艾他培南关键中间体(2S,4S)-4-乙酰硫-1-对硝基苄氧羰基-2-(3-烯丙氧羰基苯氨甲酰基)吡咯烷的合成工艺。方法以反-4-羟基-L-脯氨酸为原料经氨基、羧基保护;羟基甲磺酰化和乙酰硫化;脱去羧基保护基;与3-氨基苯甲酸烯丙酯缩合得目标物。结果与结论反-4-羟基-L-脯氨酸经6步反应制得目标物,总收率为49·4%,各步反应不需繁琐的柱色谱分离,操作简便,适合工业生产。     

含哌嗪环的三唑醇类化合物的合成及体外抗真菌活性

目的设计合成含哌嗪环侧链的三唑醇类化合物并研究其体外抗真菌活性。方法以2-氯-2′,4′-二氟苯乙酮为起始原料经多步反应合成目标化合物，化合物结构经IR、^1H-NMR谱确证；选择8种真菌为实验菌株，按国际标准抗真菌敏感性实验方法测定体外抑菌活性。结果设计合成了11个新化合物。所有目标化合物对8种真菌均具有一定的抑制作用。结论多个目标化合物的抗真菌活性明显高于阳性对照药氟康唑，其中化合物11具有广谱、高活性的优点，其体外抗真菌活性与对照药伊曲康唑相当，有进一步研究开发的价值。     

(2R,4R)-4-甲基-2-哌啶甲酸乙酯的合成工艺改进

目的 优化(2R,4R)-4-甲基-2-哌啶甲酸乙酯的合成工艺.方法 以S-(-)-α-甲基苄胺为原料,与乙醛酸乙酯反应得到[(S)-1-苯乙基亚胺基]乙酸乙酯,与异戊二烯进行环合后,再经不对称氢化和脱保护反应制得(2R,4R)-4-甲基-2-哌啶甲酸乙酯.结果 总收率从17.0％提高至47.6％.结论 本工艺可有效地降低生产成本.     

Ringoffene Serotonin-Analoga, 2. Mitt.1) Synthese von 3-(2-Aminophenyl)-propanamin- und 1-(N-Piperidino)-3-(2-aminophenyl)-3-oxo-propan-Derivaten

Ring-Opened Analogues of Serotonine, II: Synthesis of 3-(2-Aminophenyl)propanamine and 1-(Piperidin-1-yl)-3-(2-aminophenyl)propan-3-one and Their Derivatives The synthesis of the title compounds was achieved by Mannich reaction of suitably substituted acetophenones. The preparation of 3-(2-aminophenyl)propanamine and its derivatives requires complete hydrogenation of the carbonyl group of the Mannich bases.     

Synthesis and Antimicrobial Activity of 2-(4-Halophenyl)-2-(oxyaryl)propanes

Pharmaceutical Chemistry Journal -     

Synthesis, antiviral, antituberculostic, and antibacterial activities of some novel, 4-(4-substituted phenyl)-6-(4-nitrophenyl)-2-(substituted imino)pyrimidines

A variety of novel 4-(4-substituted phenyl)-6-(4-nitrophenyl)-2-substituted imino) pyrimidines were synthesized by reacting 4-(4-substituted phenyl)-6-(4-nitrophenyl)-2-amino pyrimidines with different substituted aromatic aldehydes, coumarin chloroisatin. The 4-(4-substituted phenyl)-6-(4-nitrophenyl)-2-amino pyrimidines were synthesized by reacting 3-(4'-substituted phenyl)-1-(4-nitrophenyl)-2-propen-1-ones with guanine hydrochloride. 3-(4-Substituted phenyl)-1-(4-nitrophenyl)-2-propen-1-ones were synthesized by reacting 4-nitroacetophenone with different para-substituted aromatic aldehydes. Spectral data (IR, NMR, and mass spectra) confirmed the structures of the synthesized compounds. The synthesized compounds were investigated for their antiviral, antituberculostic, and antibacterial activities. The results of antiviral, antituberculostic, and antibacterial activities indicated that the synthesized compounds exhibited mild to potent activities compared to the respective reference standards.     

2-(2-氨基-4-噻唑基)-2-(Z)-羟亚胺基乙酸的合成

以乙酰乙酸甲酯为原料,经亚硝化,硫酰氯氯化,环合,水解,精制五步反应制备了2-(2-氨基-4-噻唑基)-2-(Z)-羟亚胺基乙酸,总收率38.8%。本品是合成头孢克肟、头孢他啶、头孢地尼等的重要中间体。     

Synthesis and Antimicrobial Activity of Some New 2-(3-(4-Aryl)-1-phenyl-1H-pyrazol-4-yl) Chroman-4-ones

Seven new 2-(3-(4-aryl)-1-phenyl-1H-pyrazol-4-yl) chroman-4-ones (4a-4g) have been synthesized by cyclization of 2-hydroxychalcone analogues of pyrazole 3a-3g using conc. HCl in acetic acid. The structures of the compounds 4a-4g were established by the combined use of (1)HNMR, IR and mass spectra. All the seven compounds were tested in vitro for their antibacterial activity against two Gram positive bacteria namely Staphylococcus aureus and Bacillus subtilis and two Gram negative bacteria Escherichia coli and Pseudomonas aeruginosa. The compounds 4b, 4c, 4e, 4f, 4g have displayed good antibacterial activity when compared with commercially available antibiotic, ciprofloxacin. These compounds also were screened for their antifungal activity against two ear pathogenic fungi, namely Aspergillus Niger and A. flavus. The compounds 4a, 4c, 4d, 4g exhibited good antifungal activity when compared with commercially available antifungal, fluconazole.     

2-(4-氯-3-甲基苯基)-1,2,4-三嗪-3,5(2H,4H)-二酮的合成

对硝基邻甲苯胺经重氮化、氯代、还原、闭环、水解、脱羧6步反应得到2-（4-氯-3-甲基苯基）-1,2,4-三嗪-3,5（2H,4H）-二酮,总收率约40%。     

偶联法合成4-（2’，4’-二氟苯基）苯乙酮的研究*

目的合成4-(2',4'-二氟苯基)苯乙酮.方法以2,4-二氟苯硼酸和对溴苯乙酮为原料,四氢呋喃/水为溶剂,经新型Pd(Ⅱ)配合物催化交叉偶联反应合成目标化合物.结果和结论反应在空气中、室温下、水/有机两相体系中高效催化4-(2',4'-二氟苯基)苯乙酮的合成,产率达93%.