对分子结构对丙烯酸酯光引发聚合反应的影响进行了系统的研究。最初,研究的重点是氢键的作用,发现通过氢键进行的预组织可提高最大聚合速率(R p)。这种氢键促进的预组织也影响了所得聚合物的立构规整度。接下来,研究了由给定单体的计算偶极矩(μcalc)表示的极性影响。观察到R p与计算的玻尔兹曼平均偶极矩(μcalc)之间存在直接的线性关系。的[R p -μ计算值相关性适用于纯单体,单体混合物,甚至单体与惰性溶剂的混合物。这种相关性使得能够合理设计具有所需反应性的单体。另外,这些研究表明,聚合的传播步骤受氢键的影响,而偶极矩则影响终止速率常数。可以将这两种机理解释视为影响丙烯酸酯聚合速度的互补因素。
Solid-Supported Chloro[1,3,5]triazine. A Versatile New Synthetic Auxiliary for the Synthesis of Amide Libraries
摘要:
[GRAPHICS]2,4,6-Trichloro[1,3,5]triazine was loaded on different types of NH2-functional resins to give a new supported reagent. The best results, in term of yields products, were obtained using the chlorotriazine linked to a polystyrene-poly(ethylene glycol) resin. This reagent was employed for the solution-phase synthesis of different amides and dipeptides.
Compounds used as labels with properties comparable to known fluorescent compounds. The compounds can be conjugated to proteins and nucleic acids for biological imaging and analysis. Synthesis of the compounds, formation and use of the conjugated compounds, and specific non-limiting examples of each are provided.
Heterocycle-substituted amides, carbamates and ureas as agents for the
申请人:The Du Pont Merck Pharmaceutical Company
公开号:US05358946A1
公开(公告)日:1994-10-25
This invention relates to imidazoles, namely, heterocycle-substituted amides, carbamates and ureas as inhibitors of acyl-CoA: cholesterol acyltransferase (ACAT), pharmaceutical compositions containing them, and their use as antihypercholesterolemic and/or antiatherosclerotic agents for the treatment of atherosclerosis.
Compounds of Formulae (I), or pharmaceutically acceptable salts thereof: wherein R
1
, R
2
and Y are as defined in the specification as well as salts and pharmaceutical compositions including the compounds are prepared. They are useful in therapy, in particular in the management of pain.
A new herbicidal composition, processes for its production and its use
申请人:A. Nattermann & Cie. GmbH
公开号:EP0068295A1
公开(公告)日:1983-01-05
The invention relates to new herbicidal compositions consisting of one or more herbicidally active substances and one or more certain phospholipides in addition to standard vehicles, diluents, solvents and/or other inert auxiliaries, the ratio by weight of the herbicidally active substance or mixture of herbicidally active substances to pure phospholipide or to the mixture of pure phospholipides amounting to between 1 : 0.2 and 1 : 20. The Invention also relates to processes for producing these compositions and to processes for controlling weeds and wild grasses using the new herbicidal compositions.
A new insecticidal composition, processes for its production and its use
申请人:A. Nattermann & Cie. GmbH
公开号:EP0068297A1
公开(公告)日:1983-01-05
The invention relates to new insecticidal compositions consisting of one or more insecticidally active substances and one or more certain phospholipides in addition to standard vehicles, diluents, solvents and/or other inert auxiliaries, the ratio by weight of the mixture of insecticidally active substances to the phospholipide or mixture of phospholipides amounting to between 1 : 0.2 and 1:20. The invention also relates to processes for controlling insects using these compositions and to processes for their production.