A Novel Synthesis of Chiral Guanidinium Receptors and Their Use in Unfolding the Energetics of Enantiorecognition of Chiral Carboxylates
作者:Vinod D. Jadhav、Franz P. Schmidtchen
DOI:10.1021/jo7021026
日期:2008.2.1
A novel synthetic route to the versatile chiral bicyclic guanidinium building block is described making use of l-methionine as a starting material from the natural chiral pool. Furthermore, the synthetic elaboration of this building block is shown in the construction of macrocyclic and open chain hosts, respectively. The host design employs urea functions as the connecting units and supplementary anchor
到多用途的手性二环胍积木一种新颖的合成路线描述了制备使用的升-蛋氨酸作为天然手性库的原料。此外,在大环和开放链主体的构建中分别显示了该构件的合成细节。主体设计采用尿素功能作为连接单元和用于阴离子络合的辅助锚定基团。这些宿主与各种手性和非手性含氧阴离子的结合研究是通过等温滴定量热法进行的。对结构相似的客群中的结合能进行趋势分析,揭示了客群几何约束的重要性。缔合熵而不是自由能(亲和力)被认为是在手性胍宿主识别对映体羧酸酯时区分构型异构体所需的结构独特性的指标。