A Study of the Strength of a Template Molecule—A Functional Monomer Interaction That Affects the Performance of Molecularly Imprinted Polymers and Its Application to Chiral Amplification
molecularly imprinted polymer (MIP), N-benzoyl-(S)-valine anilide-imprinted polymer (IP-2), was prepared using hydrogen-bonding interactions as a main force in the pre-polymerization step. The performance of the IP-2 was evaluated via batch procedure and compared with a (S)-valine anilide-imprinted polymer (IP-1) that was prepared using an ionic interaction that is stronger than hydrogenbonding. Although both
Remarkable Shape-Sustaining, Load-Bearing, and Self-Healing Properties Displayed by a Supramolecular Gel Derived from a Bis-pyridyl-bis-amide of<scp>L</scp>-Phenyl Alanine
series of bis‐amides decorated with pyridyl and phenyl moieties derivedfrom L‐amino acids having an innocent side chain (L‐alanine and L‐phenyl alanine) were synthesized as potential low‐molecular‐weight gelators (LMWGs). Both protic and aprotic solvents were found to be gelled by most of the bis‐amides with moderate to excellent gelation efficiency (minimum gelator concentration=0.32–4.0 wt. % and gel–sol
合成了一系列由衍生自具有纯正侧链的L-氨基酸(L-丙氨酸和L-苯基丙氨酸)的吡啶基和苯基部分修饰的双酰胺,作为潜在的低分子量胶凝剂(LMWG)。发现大多数双酰胺都会使质子和非质子溶剂胶凝,且胶凝效率中等至极佳(最低胶凝剂浓度= 0.32–4.0 wt。%,凝胶-溶胶解离温度T gel = 52–110°C)。凝胶通过流变学,DSC,SEM,TEM和温度可变1进行表征1 H NMR测量。pH依赖性凝胶化研究表明,吡啶基部分参与了凝胶化。尝试使用单晶X射线和粉末X射线衍射数据进行结构与属性的关联。值得注意的是,一种双吡啶基双酰胺胶凝剂,即3,3-Phe(L-苯丙氨酸的3-吡啶基双酰胺)表现出出色的形状保持,承重和自愈特性。
Amide Skeletal Elongation via Amino Acid Insertion
作者:Zhengqiang Liu、Lei Zhou、Wenbo H. Liu
DOI:10.1002/chem.202301729
日期:2023.8.15
A new amide bond activation paradigm through amino acid insertion enabled by two tandem intramolecular rearrangements is reported. This strategy only requires stable and readily available amide and amino acid as the starting materials, which does not need any pre-functionalization as well as the isolation of reaction intermediates.