An Approach to 2,3-Diaminosuccinic Acid Derivatives—Synthesis of 2-Thioxo-1,3-Imidazolidines by a Mannich Reaction
作者:Dariusz Cież、Justyna Kalinowska-Tłuścik、Jakub Marchewka
DOI:10.1071/ch11463
日期:——
The article deals with a new synthesis of 2-thioxo-1,3-imidazolidine derivatives, masked 2,3-diaminosuccinic acids. The described procedure leads to the designed products by an intermolecular Mannich reaction between aldimine (ethyl iminoacetate) and enolates derived from 2-isothiocyanatocarboxylic esters. The prepared heterocyclic products having two stereogenic centers can be easily separated into
这篇文章涉及2-thioxo-1,3-imidazolidine衍生物的新合成,蒙版的2,3-二氨基琥珀酸。所描述的方法通过醛亚胺(亚氨基乙酸乙酯)与衍生自2-异硫氰酸根合羧酸酯的烯醇化物之间的分子间曼尼希反应而得到设计的产物。所制备的具有两个立体生成中心的杂环产物可以容易地分为顺式和反式非对映异构体。讨论了钛(iv),锂和钾烯醇盐的反应性以及酯基对曼尼希反应的收率和非对映选择性的影响。