Two racemic isomers of validoxylamine A have been synthesized by use of coupling reactions of the protected DL-validamine and the allylbromides, the precursors of the unsaturated branched-chain cyclitol moiety. The racemic diastereomers thus formed can be separated by chromatography on silica gel. It indicates that optically pure validoxylamine A analogs should be obtained if chiral validamine derivative
通过使用受保护的 DL-validamine 和烯丙基
溴(不饱和支链
环醇部分的前体)的偶联反应,已合成了 validoxylamine A 的两种外消旋异构体。由此形成的外消旋非对映体可以通过
硅胶色谱法分离。这表明如果使用手性
有效胺衍
生物代替外消旋物,应获得光学纯的有效木胺A类似物。