新型1-(4-取代苯基)-3-[4-(4-氧香豆素基)苯基]硫脲衍生物的合成及其抑菌活性

以4-羟基香豆素为原料,经氯化、醚化和异硫氰酸化3步反应制得中间体——4-(4-异硫氰酸酯苯氧基)香豆素(3);3与取代芳香胺经加成反应合成了9个新型的1-(4-取代苯基)-3-[4-(4-氧香豆素基)苯基]硫脲衍生物(4a~4i),其结构经1H NMR,13C NMR,IR和MS(ESI)表征。采用浑浊度法测试了4的抑菌活性。结果表明:4a、4b、4e和4f抑制烟草青枯菌活性EC50值分别为112.02、121.39、88.72和86.90μg·mL~(-1),优于噻菌铜(130.25μg·mL~(-1));4a、4b、4e和4f抑制番茄青枯菌活性EC50值分别为107.89、110.69、82.43和82.48μg·mL~(-1),优于噻菌铜(123.94μg·mL~(-1))。     

N-(香豆素-3-甲酰基)-N -取代硫脲衍生物的合成及生物活性

以香豆素-3-甲酸与亚硫酰氯的反应产物香豆素-3-甲酰氯, 与硫氰酸钾反应, 再与各种杂环胺反应合成了N-(香豆素-3-甲酰基)-N -取代硫脲类衍生物. 其结构由IR, ¹H NMR, 质谱和元素分析所表征, 并初步研究了目标化合物抗菌活性和植物生长促进作用, 发现它们大多数有优良的抑菌活性和较明显的植物生长促进活性.     

芳基肼衍生物的设计、合成及其抑菌活性研究

为了探索具有较高潜力的新型植物病原真菌抑制剂,本文以取代芳胺、3,3-二甲基-2-丁酮和乙酸乙酯为起始原料,采用Claisen缩合、氯代、重氮化、亲核取代等反应合成了16个新型的芳基肼类衍生物(4a～4p),其结构经~1H NMR、~(13)C NMR及ESI-MS确证。初步抑菌活性测试结果表明,目标化合物4d、4g和4j具有潜在的广谱性抑菌作用,其对9种植物病原真菌的平均抑制率分别为64.7%、71.2%和67.8%,显著优于阳性对照药物噁霉灵(50.1%)和百菌清(60.0%)。构效关系研究表明,保持羰基α位氯原子不变,在芳基肼结构中引入甲基、氯、氟、三氟甲氧基等基团能有效提高其抑菌作用。此研究为基于芳基肼骨架的农用抑菌剂结构优化提供了参考。     

N-取代苯基-N′-(2-苯并咪唑甲酰基)脲的合成及抑菌活性

许多芳酰基脲类化合物具有良好的杀虫活性,有些还具有一定的杀菌、除草、植物生长调节等生物活性,已成为农药研究和开发的热点[1,2].     

3-芳基香豆素衍生物的合成及其生物活性研究

对3-芳基香豆素母核进行修饰，以芳基乙酸和水杨醛为起始原料，三乙胺为催化剂，乙酸酐为溶剂，经缩合反应分别引入吸电子基团三氟甲基和给电子基甲氧基，合成了3-(4′-三氟甲基苯基)香豆素（2a）和新化合物3-(4′-甲氧基苯基)香豆素（2b），其结构经UV-Vis、 ¹H NMR、 IR和MS表征。并对其生物活性和荧光标记特性进行了研究。结果表明：2a和2b显示较强的细胞增殖抑制活性、抑菌活性，浓度为4000 μmol·L^-1时，对ECV304细胞的抑制率分别为84.22%和65.56%，对大肠杆菌、绿脓杆菌和金黄色葡萄球菌均显示抑菌活性，具有较好的荧光特性，可用于细胞染色及荧光标记。     

N-(4-取代苯基-噻唑-2-基)香豆素类亚胺化合物的合成及抑菌活性研究

由含不同取代基的水杨醛与乙酰乙酸乙酯在哌啶存在下反应,得到乙酰基香豆素中间体,再与氨基硫脲缩合,得到含香豆素基的缩氨基硫脲化合物,继而与a-溴代芳基酮发生缩合反应,合成了9个未见报道的新的N-(4-取代苯基-噻唑-2-基)香豆素类亚胺化合物,其结构用IR,1HNMR和HRMS进行了确证,初步生物活性测定实验证明部分目标化合物具有良好的抑菌活性.     

新型N-取代苯甲酰基-N′-(4-甲基苯并噻唑-2-基)硫脲衍生物的合成、晶体结构及抑菌活性

以取代苯甲酸和2-氨基-4-甲基苯并噻唑为原料合成5个新型N-取代苯甲酰基-N′-(4-甲基苯并噻唑-2-基)硫脲衍生物,化合物结构经元素分析、IR、1 H NMR和13 C NMR表征,X-射线单晶衍射测定了N-(4-甲氧苯甲酰基)-N′-(4-甲基苯并噻唑-2-基)硫脲(化合物1)的晶体结构,该晶体为单斜晶系,P21/c空间群,选择广西主要经济作物中常见的病原菌,对目标化合物进行室内抑菌活性测试,实验结果发现该类化合物具有一定的抑菌活性.     

2-苯基噻唑-香豆素衍生物的合成与抗肿瘤活性研究

以对羟基硫代苯甲酰胺和3-溴丙酮酸乙酯为原料,经过缩合、烷基化、皂化反应得到2-((4-甲氧基)苯基)噻唑-4-甲酸,再与二溴代烷烃反应得到溴取代的2-((4-甲氧基)苯基)噻唑-4-羧酸酯,最后与4-羟基香豆素反应得到4个2-苯基噻唑-香豆素衍生物。目标化合物的结构经过红外光谱、核磁共振光谱、质谱以及单晶X-射线衍射对结构进行确证。采用CCK8法评价目标化合物对人乳腺癌细胞MCF-7、人乳腺癌顺铂耐药性细胞MCF-7/DDP细胞增殖活性的影响,结果显示当浓度为50μM时,四个化合物都具有一定的抗肿瘤活性,其中化合物5c对两种癌细胞的抑制活性最强,分别为32.44%和17.99%。     

新型香豆素类衍生物的合成及其抗菌活性

以水杨醛及其衍生物为原料,通过缩合、水解、酰化、酯化四步反应合成了4个新的香豆素类衍生物-取代香豆素-3-酰水杨酸(4a～4d),其结构经uv,1H NMR,IR和元素分析表征.初步抗菌活性测试结果表明,4a-4d均有一定程度的抗真菌活性.     

新型2-(2-氨基噻唑-4-基)-2-(Z)-甲氧亚胺基乙酸酯类衍生物的合成及其抑菌活性

以乙酰乙酸甲(乙)酯,醛和酰氯为主要原料,合成了8个2-(2-氨基噻唑-4-基)-2-(Z)-甲氧亚胺基乙酸酯类衍生物(其中6个未见文献报道),其结构经1H NMR,IR和MS表征.初步抑菌活性测试结果表明,在给药量为200 mg·L-1时,化合物对小麦赤霉病菌和马铃薯干腐病菌有较好的抑菌活性.     

2-芳基-3-N-丙酰基-5-(2-溴-4-氟苯基)-1，3，4噁二唑啉类衍生物的合成及抗菌活性

2-芳基-3-N-丙酰基-5-(2-溴-4-氟苯基)-1;3;4噁二唑啉类衍生物的合成及抗菌活性;噁二唑啉衍生物;合成;结构表征;抑菌活性     

Preparation,Single-crystal Structure and Antibacterial Activity of N-（（6-Bromine-2-methoxylquinoline-3-yl）benzyl）-3-morpho-line-N-（naphthalene-1-yl）propionamide

The halogenated hydrocarbon amination reaction between the original raw mate-rial N-((6-bromine-2-methoxylquinoline-3-yl)benzyl)-3-chlorine-N-(naphthalene-1-yl)propionamide and morpholine produces the target molecule N-((6-bromine-2-methoxylquinoline-3-yl)benzyl)-3-morpholine-N-(naphthalene-1-yl)propionamide (C34H32BrN3O3,Mr=610.54),and its structure was characterized by 1H NMR,IR,H RMS and X-ray single-crystal diffraction.This crystal is of triclinic system,space group P1 with a=9.315(2),b=10.3449(12),c=15.901(3),α=80.981(14),β=76.996(17),γ=74.917(13)°,V=1433.6(5)3,Z=2,Dc=1.414 g/cm3,F(000)= 632,μ(MoKα)=1.47 mm-1,the final R=0.0735 and wR=0.2457.In total,5585 independent reflections including 3727 observed ones with I 2σ(I) were collected.The dihedral angle between naphthyl and substituted quinolyl and that between phenyl and substituted quinolyl are 61.2(1) and 108.2(1)°,respectively.Through C-H…O and C-H…N hydrogen bonds among molecules,the whole molecule is stacked into a three-dimensional structure.In addition,π-π stacking among adjacent naphthalene rings makes the molecule more stable,and the morpholine ring adopts a chair conformation.The target molecule exhibits good antibacterial activity.     

3-(吗啉吡啶基)-5-取代异噁唑类化合物的合成及抗菌活性研究

以6-氯-3-吡啶甲醛为原料, 通过多步反应合成了一系列3-(吗啉吡啶基)-5-取代异噁唑类化合物, 并用IR, 1H NMR, 13C NMR和MS进行了结构确证. 这些化合物均以异噁唑为母核, 具有近似的平面结构, 在异噁唑环的3-位引入吗啉吡啶基, 而在5-位引入酯基、取代氨基、三唑环和噁唑烷酮环. 研究了这些化合物对金黄色葡萄球菌、耐甲氧西林金黄色葡萄球菌、表皮葡萄球菌、粪肠球菌和大肠杆菌的抑制活性, 发现与噁唑烷酮类上市药物利奈唑胺相比, 目标化合物均显示出更低的抗菌活性, 最低抑制浓度(MIC)大于32 mg/L, 这些试验结果表明异噁唑母核的5-位缺乏sp3杂化结构, 可能会导致抗菌活性的显著降低.     

Synthesis,Antibacterial and Anthelmintic Activity of Novel 3-(3-Pyridyl)-oxazolidinone-5-methyl Ester Derivatives

In this study, a series of 3-(3-pyridyl)-oxazolidone-5-methyl ester derivatives was synthesized and characterized by ¹H NMR, ¹³C NMR, and LC-MS. The conducted screening antibacterial studies of the new 3-(3-pyridyl)-oxazolidone-5-methyl ester derivatives established that the methyl sulfonic acid esters have broad activity spectrum towards Staphylococcus aureus, Streptococcus pneumoniae, Bacillus subtilis and Staphylococcus epidermidis. Among them, compound 12e has the most potent activity, with an MIC of 16 μg/mL against B.subtilis, and could reduce the instantaneous growth rate of bacteria. Furthermore, molecular docking studies were also simulated for compound 12e to predict the specific binding mode of this compound. In addition, anthelmintic activity of these compounds was also evaluated against adult Indian earthworms (Pheretima posthuman). The results showed that compound 11b had the best effect. These results above can provide experimental reference for the development of novel antibacterial and anthelmintic drugs.     

Synthesis,Crystal Structure and Biological Activity of 8-（（4-（（2,3-diaminopyridin-4-yl）oxy）-3-fluorophenyl）-amino）-2-（4-fluorophenyl）-3-methyl-2,7-naphthyridin-1（2H）-one

The new title compound 8-((4-((2,3-diaminopyridin-4-yl)-oxy)-3-fluorophenyl)-amino)-2-(4-fluorophenyl)-3-methyl-2,7-naphthyridin-1(2H)-one(C26H20F2N6O2, Mr = 486.48) has been prepared and determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P21/c with a = 15.365(3), b = 13.144(2), c = 11.863(2), β= 108.882(3)°, Z = 4, V = 2267.0(7)3, Dc = 1.425 g/cm3, F(000) = 1008, μ = 0.105 mm-1, MoKa radiation(λ = 0.71073), R = 0.0480 and wR = 0.1294 for 3197 observed reflections with I 2σ(I). X-ray diffraction analysis reveals that the region C(substituents of 8-amino group and 3-methyl group on the 2,7-naphthyridin-1(2H)-one ring) of compound 6 are effectively planar. Intramolecular and intermolecular hydrogen bonds together with π···π interations are found in the structure. In addition, compound 6 shows potent c-Met and c-Kit kinase inhibition activities.     

Crystal Structure and Biological Activities of N-(5-(4-Chloro-2-(trifluoromethyl)phenyl)furan-2- carbonyl)-N'-(4,6-dimethylpyrimidin-2-yl)thiourea

The new title compound N-(5-(4-chloro-2-(trifluoromethyl)phenyl)furan-2-carbon-yl)- N?-(4,6-dimethylpyrimidin-2-yl)thiourea (C19H14ClF3N4O2S) has been synthesized, and its crystal structure and biological behaviors were studied. The title compound crystallizes in the monoclinic system, space group P21/c with a = 7.932(5), b = 33.46(2), c = 7.556(5) , β = 98.058(9)°, V = 1986(2) 3, Mr = 454.85, Z = 4, Dc = 1.521 g/cm3, μ = 0.349 mm–1 and F(000) = 928. The structure was solved by direct methods and refined to R = 0.0724 and wR = 0.1429 for 3494 observed reflections (I > 2σ(I)). Intermolecular hydrogen bonds along the b axis together with the continuous π-π interactions construct the three-dimensional architecture of the title compound. The preliminary biological tests show definite herbicidal activity for the title compound.     

2-(2,4-二氟苯基)-1-(4-烃基派嗪-1-基)-3-(1,2,4-三唑-1-基)-2-丙醇类化合物的合成及抗真菌活性

近20年来,真菌感染特别是深部真菌感染日益引起人们的广泛关注[1]。三唑类抗真菌药物对真菌的选择性较高,代谢稳定,体内动态、安全性都较好,已成为目前抗真菌药物研究开发的重点[2]。三唑类抗真菌药物是细胞色素P450 14α 去甲基酶的抑制剂,可影响该酶所催化的真菌麦角甾醇的生物合成,导致真菌细胞膜破损而死亡[3,4]。1998年,SynPhar实验室及Taiho制药公司[5]研制开发的化合物Syn 2869采用了取代哌嗪作为侧链。体外实验表明,该化合物抗菌谱广,对多种念珠菌、隐球菌及曲莓菌均有效,体内实验中,与目前临床上治疗真菌感染的主要用药伊曲…     

Crystal Structure and Biological Activities of N-（5-（4-Chloro-2-（trifluoromethyl）phenyl）furan-2-carbonyl）-N＇-（4,6,dimethylpyrimidin-2-yl）thiourea

The new title compound N-（5-（4-chloro-2-（trifluoromethyl）phenyl）furan-2-carbon-yl）- N＇-（4,6-dimethylpyrimidin-2-yl）thiourea （C19H14C1F3N4O2S） has been synthesized, and its crystal structure and biological behaviors were studied. The title compound crystallizes in the monoclinic system, space group P21/c with a = 7.932（5）, b = 33.46（2）, c = 7.556（5） A, β = 98.058（9）°, V = 1986（2） A^3 Mr = 454.85, Z = 4, Dc = 1.521 g/cm^3, μ = 0.349 mm^-1 and F（000） = 928. The structure was solved by direct methods and refined to R = 0.0724 and wR= 0.1429 for 3494 observed reflections （I 〉 2σ（I））. Intermolecular hydrogen bonds along the b axis together with the continuous π-π interactions construct the three-dimensional architecture of the title compound. The preliminary biological tests show definite herbicidalactivity for the title compound.     

Synthesis and Crystal Structure of （E）-4-（3-oxo-3-（（4- （N-（pyrimidin-2-yl）-sulfamoyl）phenyl）amino）prop- 1-en-l-yl）-l,2-phenylene diacetate Dimethanol

The title compound, (E)-4-(3-oxo-3-((4-(N-(pyrimidin-2-yl)sulfamoyl)-phenyl)ami- no)prop- 1-en- 1-yl)- 1,2-phenylene diacetate dimethanol, was synthesized by the reaction of caffeic acid with sulfadiaz...