Ionicliquids that belong to the third-generation designs due to their intended biologicalactivity are compounds with high potential applications as plant-protection products. The present study describes the synthesis and characterization of novel ionicliquids with cations based on the alkyl derivatives of 1,4-diazabicyclo[2.2.2]octane (DABCO) and an anion derived from naturally occurring pelargonic
由于其预期的生物活性而属于第三代设计的离子液体是具有作为植物保护产品的高潜在应用的化合物。本研究描述了基于 1,4-二氮杂双环[2.2.2]辛烷 (DABCO) 的烷基衍生物和源自天然壬酸的阴离子的新型离子液体的合成和表征。开发的合成方法可以获得高产率(≥96%)的产品,并且液体在室温下被表征为高粘度液体。这允许将产品分类为离子液体 (IL)。所得离子液体的结构基于它们的核磁共振和红外光谱以及元素分析得到证实。所有产品都表现出表面活性并能够部分润湿疏水表面。测试的离子液体对冬油菜表现出更高的除草活性(与温室研究中的商业制剂相比,Brassica napus L.) 和普通的lambsquarters ( Chenopodium album L.) 的剂量较低。所研究的离子液体作为拒食剂对各种昆虫也表现出不同的作用。对属于粮仓象鼻虫物种 ( Sitophilus granarius L.)
Cationic lipids have long been known to serve as antibacterial and antifungal agents. Prior efforts with attachment of cationic lipids to carbohydrate-based surfaces have suggested the possibility that carbohydrate-attached cationic lipids might serve as antibacterial and antifungal pharmaceutical agents. Toward the understanding of this possibility, we have synthesized several series of cationic lipids attached to a variety of glycosides with the intent of generating antimicrobial agents that would meet the requirement for serving as a pharmaceutical agent, specifically that the agent be effective at a very low concentration as well as being biodegradable within the organism being treated. The initial results of our approach to this goal are presented.
excessive growth of zeolites and induced the formation of intercrystalline mesopores. Nanocrystalline zeolites exhibited exceptionally high activity in the acid-catalyzed reactions involvinglargemolecules when compared with conventional zeolites. This synthesis strategy can be extended for the preparation of zeolites of different framework structures or other porous materials in the future.
Synthesis and structure–activity relationship of novel 1,4-diazabicyclo[2.2.2]octane derivatives as potent antimicrobial agents
作者:Lyubov A. Yarinich、Ekaterina A. Burakova、Boris A. Zakharov、Elena V. Boldyreva、Irina N. Babkina、Nina V. Tikunova、Vladimir N. Silnikov
DOI:10.1016/j.ejmech.2015.03.033
日期:2015.5
A series of new quaternary 1,4-diazabicyclo[2.2.2]octanederivatives was synthesized and evaluated for activity against several strains of both Gram positive and Gram negative bacteria and one strain of fungus under different inoculum size. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against six species of microorganisms were tested. Results show a clear structure–activity
合成了一系列新的1,4-二氮杂双环[2.2.2]辛烷季铵衍生物,并评估了在不同接种量下对革兰氏阳性和革兰氏阴性细菌的几种菌株以及一种真菌的活性。测试了针对六种微生物的最小抑菌浓度(MIC)和最小杀菌浓度(MBC)。结果表明,在1,4-二氮杂双环[2.2.2]辛烷叔胺位点的取代烷基链长度与抗菌活性之间存在明确的结构-活性关系。对于化合物4a - 4k,发现MIC随着烷基链长从乙基到十二烷基的增加而降低,然后在更高的链长处增加(n> 14)。发现化合物的MIC值低4f和4g烷基链的长度为10至12个碳原子(1.6μg/ ml),与参考药物环丙沙星相当。另外,进行了时间杀灭试验以检验杀菌动力学。结果表明4f和4g对金黄色葡萄球菌具有快速杀灭作用,并在10 h g / ml的浓度下于2.5 h内消除了100%的初始细菌接种物。此外,化合物4g消除了Ps初始接种物的99.9%以上。铜绿假单胞菌经过2
Synthesis, Antifungal Activity, and Biocompatibility of Novel 1,4-Diazabicyclo[2.2.2]Octane (DABCO) Compounds and DABCO-Containing Denture Base Resins
作者:Jenny L. Herman、Yapin Wang、Elizabeth A. Lilly、Thomas E. Lallier、Brian M. Peters、Suleiman Hamdan、Xiaoming Xu、Paul L. Fidel、Mairi C. Noverr
DOI:10.1128/aac.02575-16
日期:2017.4
treatment reduces symptoms, infections are often recurrent. One strategy to address this problem is to incorporate compounds with fungicidal activities into denture materials to prevent colonization. Our laboratory synthesized novel derivatives of 1,4-diazabicyclo[2.2.2]octane (DABCO), which is an organic compound typically used as a catalyst in polymerization reactions. DABCO derivatives with different aliphatic
真菌病原体白色念珠菌引起多种口腔感染,包括义齿口腔炎,其特征是直接接触义齿的口腔粘膜发炎,并影响了许多其他健康的义齿佩戴者。尽管抗真菌治疗可减轻症状,但感染经常会复发。解决该问题的一种策略是将具有杀真菌活性的化合物掺入义齿材料中以防止定植。我们的实验室合成了1,4-二氮杂双环[2.2.2]辛烷(DABCO)的新型衍生物,它是通常在聚合反应中用作催化剂的有机化合物。具有不同脂族链长的DABCO衍生物(DC16,DC16F,DC18和C6DC16),以及与DABCO化合物共轭的甲基丙烯酸酯单体(DC11MAF和C2DC11MAF),合成并测试其抗菌活性。所有化合物在2至4μg/ ml的浓度下均对几种念珠菌具有杀真菌活性。而且,在盘片扩散测定中,制造为包含1、2或4重量%的DABCO化合物的丙烯酸义齿基料树脂抑制了表面白色念珠菌生物膜的形成以及真菌的生长。值得注意的是,老化2个月的椎间盘(4 w