Novel bis[1,6-dihydro-6,6-dimethyl-1,3,5-triazine-2,4-diamines] as antitrypanosomal agents
摘要:
A series of novel 1,1'-(4,1-phenylene)bis [1,6-dihydro-6,6-dimethyl-1,3,5-triazine-2,4-diamines] was prepared and evaluated for activity against Trypanosoma rhodesiense in mice. The importance of the bis structure and the nature of the spacer between the two phenyl rings for optimal activity have been revealed. The potent parenteral activity of several analogues within this series as well as preliminary indication of oral activity lends encouragement to further development of this structural class.
To provide a novel diamine, and a polyimide precursor and a polyimide using it. A diamine represented by the formula (1):
wherein each of X
1
and X
5
which are independent of each other, is a single bond or the like; each of X
2
and X
4
which are independent of each other, is —CH
2
— or the like; X
3
is a C
1-6
alkylene or the like; each of Y
1
and Y
2
which are independent of each other, is a single bond or the like; R is a C
1-20
linear, branched or cyclic hydrocarbon group; and a is 0 or 1).
with theoretical studies and relationship between molecularstructure and mesogenic behavior has been established. The mesomorphic properties of the resultant dimers were characterized by differential scanning calorimetry (DSC) and polarized optical microscopy (POM) equipped with a hot stage. Change in mesomorphic properties with change of methylene spacers was observed. Enantiotropic mesogenic behavior
摘要 已经制备了一个新的同源系列的对称、弯曲形状的双苯甲酰胺二聚体。几个 1,n-双 (对氨基苯氧基) 烷烃 (n = 3, 5, 9,10,11) 被用作间隔物,并且对己氧基尾部已经合成并通过酰胺连接基团附加到间隔物上。使用半经验方法的计算分析探索了不同的重要参数。实验结果与理论研究相关,并建立了分子结构与介晶行为之间的关系。所得二聚体的介晶性质通过差示扫描量热法 (DSC) 和配备热台的偏光显微镜 (POM) 进行表征。观察到介晶性质随着亚甲基间隔基的变化而变化。D 3 A 6 表现出对映性介晶行为,观察到D 10 A 6 和D 11 A 6 以及针状和模糊的纹饰纹理。观察到增加的亚甲基间隔链长度降低了熔融温度。热重分析显示二聚体的热稳定性高达 360 °C。
A photoswitchable methylene-spaced fluorinated aryl azobenzene monolayer grafted on silicon
Aryldiazonium-terminated methylene-spaced trifluoromethylazobenzene derivatives have been synthesized. Their self-assembled monolayers (SAMs) on a silicon surface allow for a stable and reversible molecular photoswitch.
Substituted bis-ethers, such as .alpha.,107 -bis-(4-aminophenoxy)-alkyls, are prepared in process which involves sequential addition of reactants, reagents or neutralizing compounds without recovery of intermediate products such as diamides and diamine acid salts. When water is used as the solvent, the process is simplified and product yields in excess of about 70% are obtained.
A stable molecular aggregate having an ordered structure comprising a surfactant containing a hydrophilic moiety and hydrophobic moiety and having in the hydrophobic moiety or between the hydrophobic moiety and the hydrophilic moiety a rigid moiety at least 10 .ANG. long is disclosed. The structure, unlike the spherical micelle formed by an ordinary surfactant in water or the loose lamellar micelle formed by a soap in a high concentration, is stable and durable in low concentrations, keeping a high degree of regularity. The structure has primarily a bilayer structure as a basic structural unit.