141607-18-3Relevant academic research and scientific papers
Organoimido-derivatized hexamolybdates with a remote carboxyl group: Syntheses and structural characterizations
Sima, Guohui,Li, Qiang,Zhu, Yi,Lv, Chunlin,Khan, Rao Naumaan Nasim,Hao, Jian,Zhang, Jin,Wei, Yongge
, p. 6551 - 6558 (2013/07/11)
Four novel organoimido derivatives of hexamolybdate containing a remote carboxyl group have been synthesized: [Bu4N]2[Mo 6O18(N-C6H4-3-COOH)] (1), [Bu 4N]2[Mo6O18(N-C6H 4-2-CH3-4-COOH)] (2), [Bu4N] 2[Mo6O18(N-C6H4-2-CH 3-5-COOH)] (3), and [Bu4N]2[Mo 6O18(N-C6H4-2-CH3-3-COOH) ] (4) with 3-aminobenzoic acid, 4-amino-3-methylbenzoic acid, 3-amino-4-methylbenzoic acid, and 3-amino-2-methylbenzoic acid as the imido-releasing agents, respectively. Their structures have been characterized by IR, UV-vis, 1H NMR, ESI-MS, and single-crystal X-ray diffraction techniques. Hydrogen bonding interactions play an important role in the supramolecular assemblies of these compounds in the solid state. Although the incorporated organic ligands are similar to each other, their supramolecular assembly behaviors are quite different. For compound 1, the dimer structure is formed via hydrogen bonding between the carboxyl group and the POM cluster of two neighboring cluster anions. For compound 2, the 1D chain structure is formed via hydrogen bonding between the carboxyl groups and the POM clusters of the cluster anions. For compound 3, the 2D plane structure is formed via two types of hydrogen bonding between the aromatic rings and the POM clusters of the cluster anions. For compound 4, the 1D plus 2D structures are formed via three types of hydrogen bonding between the aromatic rings and the POM clusters of the two types of cluster anions with different orientations.
Synthesis of cyclic γ-amino acids for foldamers and peptide nanotubes
Rodriguez-Vazquez, Nuria,Salzinger, Stephan,Silva, Luis F.,Amorin, Manuel,Granja, Juan R.
, p. 3477 - 3493 (2013/07/11)
Cyclic γ-amino acids are molecular building blocks of great interest in peptide and foldamer chemistry, as they allow the preparation of new structures that are not found in Nature. In this paper, we describe the synthesis of cyclic γ-amino acids that have a cis relationship between the amino and the carboxylic acid groups. This arrangement, in most cases, induces the resulting peptides to adopt a flat conformation, which makes them appropriate for the design of foldamers that adopt β-sheet-type structures. We describe the synthesis of cyclic γ-amino acids that have a cis relationship between the amino and the carboxylic acid groups. This makes them suitable for the design of foldamers that adopt β-sheet-type structures.
