3-次苄基硫色满酮类化合物的合成及其体外抗真菌活性

目的:设计合成3-次苄基硫色满酮类化合物,并对其抗真菌活性进行初步评价.方法:以取代苯硫酚为原料,经多步反应制得目标化合物,并采用琼脂2倍浓度稀释法测定目标化合物的抗真菌活性.结果:共合成了6个新化合物,经红外光谱、核磁共振氢谱及元素分析确证其结构.目标化合物对大部分供试真菌具有活性,但弱于对照品克霉唑.结论:3-次苄基硫色满酮在体外具有一定的抗真菌活性.     

4-色满酮Mannich碱类化合物的合成及其抗炎活性

目的设计合成一些4-色满酮Mannich类化合物,并且考察其抗炎活性.方法以取代的4-色满酮为原料,经过Mannich反应合成4-色满酮Mannich碱类化合物,并测定了目标化合物的抗炎活性.结果合成了17种4-色满酮Mannich碱类化合物,并经元素分析、红外光谱、核磁共振氢谱确证这些化合物的结构,药理活性筛选结果表明:大多数化合物具有显著的抗炎活性.     

4-色满酮Mannich碱类化合物的合成及其水溶液的热稳定性研究

目的设计合成一些 4 色满酮Mannich类化合物 ,并且考察其水溶液的稳定性。方法以取代的 4 色满酮为原料 ,经过Mannich反应合成 4 色满酮Mannich碱类化合物 ,并利用高效液相色谱法测定所合成的 4 色满酮Mannich碱类化合物的水溶液的稳定性。结果合成 3种 4 色满酮Mannich碱类化合物 ,并经元素分析 ,红外光谱 ,核磁共振氢谱确认了化合物结构 ,其水溶液在室温和 (37± 1)℃时 2 4h内均没有显著分解。     

硫色满酮Mannich碱衍生物的合成及其抗真菌活性

设计并合成了 12个硫色满酮的Mannich碱衍生物 ,12个化合物均未见文献报道 ,其结构经红外光谱、核磁共振氢谱及元素分析结果证实 .体外抑菌试验表明 :12个化合物均有不同程度的抑菌活性 ,其中化合物 (1)与对照品克霉唑相当 .     

6,8——二氯硫色满酮衍生物的合成及抗真菌活性

６，８——二氯硫色满酮衍生物的合成及抗真菌活性方林郭春张国梁张炜设计并合成了１３个硫色满酮衍生物，其中１２个为未见文献报道的新化合物．对这些化合物进行了体外抑真菌活性测定，结果表明，对供试真菌均有不同程度的抑菌作用．6,8——二氯硫色满酮衍生物的合成及?..     

3-溴-4-硫色(满)酮衍生物的合成及其抗真菌活性研究

目的 设计合成3-溴-4-硫色(满)酮类化合物，并对其抗真菌活性进行初步评价。方法 以取代硫色(满)酮为原料，经溴化、氧化等反应制得目标化合物，化合物的体外抗真菌活性测定采用二倍浓度稀释法。结果 共合成了9个未见文献报道的新化合物，经红外光谱、核磁共振氢谱及元素分析确证其结构。其中化合物Vb的活性好于或相当于对照药。结论 硫色(满)酮3-位溴取代后具有较强的抗真菌活性。     

2,3,3a,4-四氢硫色烯并[4,3-c]吡唑类化合物的合成及其体外抗真菌活性研究

目的 设计合成2,3,3a,4-四氢硫色烯并[4,3-c]吡唑类化合物，并对其体外抗真菌活性进行初步评价。方法 以取代苯硫酚为起始原料，合成中间体3-次苄基硫色满酮，该中间体与水合肼在热醋酸中反应生成目标化合物。采用二倍稀释法对4种受试真菌—絮状表皮毛癣菌(E. floccosum)、石膏样小孢子菌(M. gypseum)、绿色木霉菌(T. viride)和断发毛癣菌(T. tonsurans)进行体外抗真菌活性测试。结果 合成了12个新的2,3,3a,4-四氢硫色烯并[4,3-c]吡唑类化合物，其结构经氢核磁共振谱、质谱和元素分析确证。抗真菌实验结果表明，所合成的目标化合物对供试真菌具有一定程度的抑制活性。结论 2,3,3a,4-四氢硫色烯并[4,3-c]吡唑类化合物具有体外抗真菌活性。     

3—取代硫色酮衍生物的合成和抑真菌活性研究

报道了硫色酮衍生物的合成路线；合成了七个化合物。抗真苏活性试验结果表明，对供试菌有不同程度的抗菌活性。体例物３－苄基－６－氯硫色满酮的抗真菌活性与克霉唑相当。     

氯代硫色烯并[4,3-c]吡唑啉衍生物的合成及其抗真菌活性

目的:设计合成氯代硫色烯并[4,3-c]吡唑啉衍生物,并考察其抗真菌活性.方法:以对氯苯硫酚为原料经多步反应合成目标化合物,并采用柱色谱实现其顺反异构体的分离.结果:合成6个未见文献报道的新化合物,其结构均经核磁共振氢谱、质谱确证.初步药理实验显示目标化合物具有较强的抗真菌活性.结论:氯代硫色烯并[4,3-c]吡唑啉衍生物在体外具有一定的抗真菌活性.     

硫色满酮并氮杂环衍生物体外抗真菌活性及构效关系研究

对硫色满酮并氮杂环衍生物进行体外抗真菌实验,筛选具有抗真菌活性的化合物并探讨其构效关系。方法：利用微量稀释法,以氟康唑和两性霉素B为阳性对照药,测定硫色满酮类并氮杂环衍生物对白色念珠菌、新生隐球菌、断发毛癣茵、红色毛癣菌、申克孢子丝菌（菌丝相）、石膏样小孢子菌、卡氏枝孢霉、黑曲霉、絮状毛癣菌的体外抑菌活性。结果：Bb,Da,Db,I,K对絮状表皮癣菌抑制作用显著,尤其Db的MIC低于两性霉素B;K对石膏样小孢子丝菌的MIC与两性霉素B相当。二甲氨基和甲氧基取代后,抗真菌比其他取代基化合物抗真菌活性高。结论：硫色满酮并氮杂环衍生物对常见致病真菌有一定的体外抑菌活性,值得深入研究。     

Antifungal activity of some mono, bis and quaternary Mannich bases derived from acetophenone

The development of resistance to current antifungal therapeutics drives search for new effective agents. Some Mannich bases have antifungal activity, but no information is available regarding the antifungal activity of acetophenone derived Mannich bases. Mono Mannich bases of acetophenone 1-3 were synthesized and converted into their corresponding bis derivatives, 5-7. Representative quaternary derivatives 4 and 8 were also synthesized. Antifungal activities of the compounds were evaluated using some yeasts and dermatophytes in vitro. Mono Mannich base 3 and quaternary compounds 4 and 8 were found to be 2-16 times more potent than the reference compound amphotericin B against dermatophytes: Trichophyton rubrum, Trichophyton mentagrophytes, and Microsporum canis. Compounds 4 and 8 were also found to be 2 times more effective compared with amphotericin B against the yeast Saccharomyces cerevisiae. Quaternization procedure improved the biological activity dramatically, whereas conversion of mono Mannich bases to corresponding bis derivatives generally did not affect antifungal activity. Our results suggest that acetophenone derived mono Mannich base 3 and quaternary derivatives 4 and 8 may serve as leading compounds for further studies to develop new antifungal agents with their highly potent antifungal activity.     

Antifungal evaluation of bis Mannich bases derived from acetophenones and their corresponding piperidinols and stability studies

The development of resistance to current antifungal therapeutics drives the search for effective new agents. The fact that some acetophenone-derived Mannich bases had shown antifungal activities in our previous studies led us to design and synthesize acetophenone-derived bis Mannich bases, B1-B5, bis(beta-aroylethyl)methylamine hydrochlorides, to evaluate their antifungal activity. These bis Mannich bases were then converted to the corresponding piperidinols, C1-C5, which are structural isomers of bis derivatives, 3-aroyl-4-aryl-1-methyl-4-piperidinol hydrochlorides, to see alterations in biological activity. A stability study of B1 and Cl was also carried out to estimate whether they alkylate the thiols. All compounds studied have shown antifungal activity, especially against dermatophytes (Trichophyton rubrum, Trichophyton mentagrophytes, Trichophyton tonsurans, and Microsporum canis), in the concentration range studied (2-128 microng/ml). The activity was especially apparent against T. tonsurans. All compounds had at least equal antifungal activity compared with the reference compound amphotericin-B against T. tonsurans. Bis Mannich bases were generally found to be more potent compounds than their structural isomer piperidinols. The results of our stability studies suggest that thiol alkylation may contribute to the antifungal activity of the Mannich bases synthesized. Even though all compounds showed antifungal activity against dermatophytes, bis Mannich bases B1, B2, B4, and B5 appear to have potential for developing novel antifungal agents against dermatophytes.     

Synthesis, characterization and evaluation of mannich bases as potent antifungal and hydrogen peroxide scavenging agents

In the present study, (E)-2-{ [-2-(2,4-Dinitrophenyl)hydrazono]methyl} phenol (3) was synthesized and used as key intermediate for the synthesis of new Mannich bases. All the synthesized compounds were evaluated for their antifungal activity against three fungal strains Candida albicans, Candida tropicalis and Aspergillus niger and antioxidant activity. The structure of these compounds was confirmed by IR, 1H NMR and 13C NMR studies. Most of the compounds exhibited moderate to significant activities.     

2-(E)-(4-甲基亚苄基)环戊酮曼尼希碱的合成及其抗炎活性研究

目的 合成2－（E）－（4－甲基亚苄基）环戊酮的曼尼希碱及其类似物并研究目标化合物的抗炎作用。方法 以N－环戊烯基吗啉、4－甲基苯甲醛及多种胺类为原料合成目标化合物，并以二甲苯致小鼠耳肿胀模型测试目标化合物的抗炎活性。结果 共合成13个新化合物，经IR，^1H-NMR和MS确证其结构；部分化合物对二甲苯致小鼠耳肿胀具有较强的抑制作用。结论 2－（E）－（4－甲基亚苄基）环戊酮曼尼希碱类化合物具有较强的抗炎活性。     

Evaluation of antimicrobial activities of several mannich bases and their derivatives

The aim of this study was to evaluate the antimicrobial activities of several Mannich bases and their derivatives against pathogenic bacteria and fungi. 3-Dimethylamino-1-phenyl-1-propanone hydrochloride (Ig1) as mono-Mannich base, bis(beta-aroylethyl)methylamine hydrochlorides (B1, B5) as bis-Mannich bases, 3-aroyl-4-aryl-1-methyl-4-piperidinol hydrochlorides (C1, C5) as piperidinol derivatives, which are structural isomers of bis-Mannich bases, N,N'-Bis(3-dimethylamino-1-phenylpropylidene)hydra zine dihydrochlorides (D1) as azine derivative of mono-Mannich base Ig1, and some representative quaternary derivatives (Ig4 and C6), which are quaternary derivatives of Ig1 and C1, respectively, have been synthesized. Aryl parts were phenyl in B1 and C1, and 2-thienyl in B5 and C5. Bis-Mannich bases and quaternary Mannich bases were found to be effective antifungal derivatives. Quaternary mono-Mannich base Ig4 has shown twice the amount of higher antifungal potency against the human pathogenic fungus Microsporum canis compared with the reference drug amphotericin-B and it had equal potency against many other fungi species pathogenic in humans and plants. Ig4 was effective against Staphylococcus aureus among the bacteria tested. Preparation of bis-Mannich bases and qua ternization procedure seemed suitable chemical modifications to prepare effective antifungal compounds. Especially quaternary derivatives Ig4, and to some extent C6, seem to be model compounds to develop new antimicrobial agents for further studies.     

Synthesis of novel nalidixic acid-based 1,3,4-thiadiazole and 1,3,4-oxadiazole derivatives as potent antibacterial agents

Novel nalidixic acid-based 1,3,4-thia(oxa)diazoles, their thio ethers, sulfones, bis mercapto, and Mannich bases were synthesized and characterized by Infrared spectra, (1) H NMR, (13) C NMR, and elemental analysis. These compounds were evaluated for their antibacterial activity against two Gram-positive and three Gram-negative bacteria. The preliminary bioassay showed that most of the compounds had better antibacterial activity than the parent compounds, 1,3,4-thia(oxa)diazoles, at the dosage 50μg/mL toward five test bacteria. Four Mannich bases of nalidixic acid-based 1,3,4-thiadiazole exhibited maximum antibacterial activity against Bacillus subtilis, Klebsiella pneumoniae, and Pseudomonas aeruginosa with minimum inhibitory concentration in the range of 6.25-125μg/mL.     

2-(E)-(4-甲磺酰基)亚苄基环戊酮Mannich碱类化合物的合成及其抗炎活性

目的设计合成2-(E)-(4-甲磺酰基)亚苄基环戊酮Mannich碱类化合物,并对其抗炎活性进行初步评价.方法以环戊酮、4-甲磺酰基苯甲醛及胺类化合物为原料,经多步反应合成目标化合物,并以二甲苯致小鼠耳肿胀模型测试目标化合物的抗炎活性.结果与结论共合成10个新化合物,经1H-NMR和MS确证其结构.初步药理实验结果显示9个目标化合物均具有一定的抗炎活性.     

3-异丙基、3-正戊基环戊二酮-1,2 Mannich碱衍生物的合成及抗癌活性

以３异丙基、３正戊基环戊二酮１，２为母体化合物，设计合成了９个未见文献报道的Ｍａｎｎｉｃｈ碱衍生物，并在体外进行了抗癌活性评价。初步药理活性筛选结果表明，３正戊基环戊二酮１，２Ｍａｎｎｉｃｈ碱衍生物的抗癌活性较强，３异丙基环戊二酮１，２Ｍａｎｎｉｃｈ碱衍生物的活性相对较弱，多数化合物的抗癌活性优于阳性对照药５Ｆｕ．