The synthesis of peptides by stereoselective four component condensation led to new ways to prepare pure chiral chemical compounds by asymmetric synthesis. A scheme of asymmetric syntheses is described, which starts with a so-called productively stereoselective synthesis affording a high yield of the desired product. The stereoisomeric byproduct, which contaminates the main product, is converted into
通过立体选择性四组分缩合来合成肽导致了通过不对称合成制备纯手性化合物的新方法。描述了一种不对称合成的方案,该方案从所谓的生产立体选择性合成开始,提供了所需产物的高产率。污染主要产物的立体异构体副产物通过随后的具有所谓破坏性立体选择性的反应转化为易于除去的非异构体化合物。作为说明,描述了无立体异构体的
谷胱甘肽衍
生物的合成,其主产物的收率为71.3%,纯度> 99.97%。