Exploring the Chiral Recognition of Carboxylates by <i>C</i><sub>2</sub>-Symmetric Receptors Bearing Glucosamine Pendant Arms
作者:Dawid Lichosyt、Sylwia Wasiłek、Janusz Jurczak
DOI:10.1021/acs.joc.6b00763
日期:2016.9.2
Two urea-based receptors containing a glucosamine derivative were synthesized and investigated in terms of their ability to recognize chiral and achiral anions. Both receptors demonstrated a high affinity toward carboxylates in very competitive DMSO/water mixtures. The chiral recognition properties of these compounds were studied using structurally differentiated guests derivedfrom mandelic acid and
合成了两种含有葡糖胺衍生物的脲基受体,并就其识别手性和非手性阴离子的能力进行了研究。在非常有竞争力的DMSO /水混合物中,两种受体都表现出对羧酸盐的高亲和力。使用衍生自扁桃酸和α-氨基酸的结构差异化客体研究了这些化合物的手性识别特性。我们发现,对于所有研究的阴离子,受体1的对映选择性均显着高于化合物2,其K S / K R比最高为2。 归因于其糖部分与手性阴离子的侧链之间缺乏相互作用,这是由于它们的空间排列不足。
Naphthyridine amide–urea conjugate: a case toward selective fluorometric sensing of N-acetyl proline carboxylate
作者:Kumaresh Ghosh、Tanmay Sarkar
DOI:10.1007/s10847-011-9929-2
日期:2011.10
A simple neutral naphthyridine-based chemosensor 1, which selectively recognizes the tetrabutylammonium salt of N-acetyl-l-proline over the other N-acetyl-l-amino acid salts studied in CHCl3 containing 0.1% DMSO, has been designed and synthesized. Moreover, the complexation-induced change in emission characteristics of 1 distinguishes the amino acid salts examined from their conjugate acids. Interaction studies were performed by UV–vis, fluorescence and NMR spectroscopic methods. A simple neutral naphthyridine –based chemosensor 1, which selectively recognizes the tetrabutylammonium salt of N-acetyl-l-proline in CHCl3 containing 0.1% DMSO, has been designed and synthesized. The complexation-induced change in emission characteristics of 1 distinguishes the amino acid salts from their conjugate acids.