Zeroth and first generation dendritic wedges with thiophene amide as surface group and 1, 2, 3-triazole as bridging unit which can function as molecular tweezers are synthesised by both convergent and divergent approaches. All the synthesised dendritic wedges displayed the absorbance band between 256 and 294nm and fluorescence maximum between 357 and 528nm supporting their self complementary property. Dendritic wedge 5 showed better antibacterial activity than other dendritic wedges in the assay against the human pathogens viz Staphylococcus aureus, Escherichia coli, Bacillus cereus and Klebsiella pneumonia and the dentritic wedge 5 was also effective in the computational molecular docking studies.
Synthesis of mono- and di-[12]aneN3 ligands and study on the catalytic cleavage of RNA model 2-hydroxypropyl-p-nitrophenyl phosphate with their metal complexes
作者:Zhi-Fo Guo、Hao Yan、Zhi-Fen Li、Zhong-Lin Lu
DOI:10.1039/c1ob05942d
日期:——
The ortho arrangement of the two [12]aneN3 units and the presence of 5- or 2-positioned substituents in the benzene ring as well as N-methylation of [12]aneN3 units greatly reduced the catalytic activities due to the steric effects. These results clearly indicate that the structures of the linker between two [12]aneN3 units play very important role in their catalytic synergistic effects.