The synthesis of a new class of optically active ligands such as the title compounds is presented. All the multistep procedures adopted start by the conversion of L-serine and L-threonine into the proper 2,2-dimethyloxazolidines, followed by transformation of the corresponding nitriles to pyridines. The reaction sequence occurs without loss of enantiomeric purity and with overall satisfactory yield.
介绍了一类新型光学活性
配体的合成,如题目所示的化合物。所有的多步程序均以
L-丝氨酸和
L-苏氨酸转化为适当的2,2-二甲基
噁唑啉开始,随后将相应的腈转化为
吡啶。这一反应序列在不损失对映纯度的情况下进行,并且整体上具有令人满意的产率。