Spirocyclopentanone–anthracene adducts, novel antimalarial agents, have been synthesized by employing the racemic and the optically active dimethyl itaconate–anthracene adducts in a reaction with piperine via tandem Michael addition–Dieckmann condensation reactions as the key steps. All adducts exhibited ...
Learn the definition of a racemic mixture and understand its biological significance. See racemic mixture examples and find their different applications. Updated: 11/21/2023 Table of Contents What is a Racemic Mixture? Are Racemic Mixtures Optically Active? Racemic Mixtures Significance Racemic ...
In other cases, it may be of interest to racemize a natural optically active molecule. Thus, to warrant a constant pharmacological activity of ergotamine, which is racemized in solution producing inactive ergotaminine, the commercial solution is produced as an equilibrium mixture of the two ...
A direct and efficient route for the construction of racemic and optically active L-telluromethionine (L-Te-Met) starting from the readily available hydrochloride salt of 卤-amino--butyrolactone and lithium methyltellurolate is described. The reaction has been successfully scaled up to afford gram...
The meaning of RACEMIC is of, relating to, or constituting a compound or mixture that is composed of equal amounts of dextrorotatory and levorotatory forms of the same compound and is not optically active.
In accordance with many other known methods of resolution, a DL-racemic compound is reacted with an optically active reagent (resolving agent) to form a mixture of diastereoisomeric derivatives, e.g. by salt formation, which can be separated e.g. by fractional crystallization. Each of the ...
3) racemic mixture 外消旋混合物 1. The defination and determination of racemic mixture of optically active isomers are reviewed. 介绍了光学活性异构体的外消旋混合物定义、判断及其一种重要的拆分方法———优先结晶法。4) pseudoracemic mixture 假外消旋混合物...
4) racemic mixture 外消旋混合物 1. The defination and determination of racemic mixture of optically active isomers are reviewed. 介绍了光学活性异构体的外消旋混合物定义、判断及其一种重要的拆分方法———优先结晶法。5) racemic compound 外消旋化合物 例句>> ...
The defination and determination of racemic mixture of optically active isomers are reviewed. 介绍了光学活性异构体的外消旋混合物定义、判断及其一种重要的拆分方法———优先结晶法。6) racemic compound 外消旋化合物 例句>> 补充资料:氨基酸外消旋法断代 利用死亡动物氨基酸化学变化速度测定年代的技术。它是...
4) racemic mixture 外消旋混合物 1. The defination and determination of racemic mixture of optically active isomers are reviewed. 介绍了光学活性异构体的外消旋混合物定义、判断及其一种重要的拆分方法———优先结晶法。5) racemic compound 外消旋化合物 例句>> ...