2-(2-Arylphenyl)benzoxazole As a Novel Anti-Inflammatory Scaffold: Synthesis and Biological Evaluation
摘要:
The 2-(2-arylphenyl)benzoxazole moiety has been found to be a new and selective ligand for the enzyme cyclooxygenase-2 (COX-2). The 2-(2-arylphenyl)benzoxazoles 3a-m have been synthesized by Suzuki reaction of 2-(2-bromophenyl)benzoxazole. Further synthetic manipulation of 3f and 3i led to 3o and 3n, respectively. The compounds 3g, 3n, and 3o selectively inhibited COX-2 with selectivity index of 3n much better than that of the COX-2 selective NSAID celecoxib. The in vivo anti-inflammatory potency of 3g and 3n is comparable to that of celecoxib and the nonselective NSAID diclofenac at two different doses, and 30 showed better potency compared to these clinically used NSAIDs.
C–O Bond Activation by Nickel–Palladium Hetero-Bimetallic Nanoparticles for Suzuki–Miyaura Reaction of Bioactive Heterocycle-Tethered Sterically Hindered Aryl Carbonates
作者:Priyank Purohit、Kapileswar Seth、Asim Kumar、Asit K. Chakraborti
DOI:10.1021/acscatal.6b02912
日期:2017.4.7
Ni–Pd binary nanoclusters are reported for the activation of the C–O bond for Suzuki–Miyaura cross-coupling of bioactive heterocycle-tethered stericallyhindered aryl carbonates with aryl boronic acids. The reaction does not take place in the presence of either the Pd or Ni salts/complexes or the individual Pd or Ni nanoparticles, indicating ensembling cooperativity between the Pd and Ni nanoparticles
Cooperative Catalysis by Palladium–Nickel Binary Nanocluster for Suzuki–Miyaura Reaction of <i>Ortho</i>-Heterocycle-Tethered Sterically Hindered Aryl Bromides
作者:Kapileswar Seth、Priyank Purohit、Asit K. Chakraborti
DOI:10.1021/ol500587m
日期:2014.5.2
The palladium–nickel binary nanocluster is reported as a new catalyst system for Suzuki–Miyaura cross-coupling of ortho-heterocycle-tethered stericallyhindered aryl bromides. The inferior results obtained with the reported Pd/Ni salts/complexes or individual Pd/Ni nanoparticles as catalyst reveal the cooperative catalytic effect of the Pd and Ni nanoparticles in the Pd–Ni nanocluster. The broad substrate
2-(2-Arylphenyl)benzoxazole As a Novel Anti-Inflammatory Scaffold: Synthesis and Biological Evaluation
作者:Kapileswar Seth、Sanjeev K. Garg、Raj Kumar、Priyank Purohit、Vachan S. Meena、Rohit Goyal、Uttam C. Banerjee、Asit K. Chakraborti
DOI:10.1021/ml400500e
日期:2014.5.8
The 2-(2-arylphenyl)benzoxazole moiety has been found to be a new and selective ligand for the enzyme cyclooxygenase-2 (COX-2). The 2-(2-arylphenyl)benzoxazoles 3a-m have been synthesized by Suzuki reaction of 2-(2-bromophenyl)benzoxazole. Further synthetic manipulation of 3f and 3i led to 3o and 3n, respectively. The compounds 3g, 3n, and 3o selectively inhibited COX-2 with selectivity index of 3n much better than that of the COX-2 selective NSAID celecoxib. The in vivo anti-inflammatory potency of 3g and 3n is comparable to that of celecoxib and the nonselective NSAID diclofenac at two different doses, and 30 showed better potency compared to these clinically used NSAIDs.