• Bulletin of the Korean Chemical Society
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• v.31 no.6
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• pp.1719-1722
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• 2010

• Bulletin of the Korean Chemical Society
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• v.14 no.4
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• pp.449-452
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• 1993

o-Aminophenols react with alcohols in the presense of a catalytic amount of ruthenium catalyst at 180$^{\circ}C$ to give 2-substituted benzoxazole in good yield. The yields of 2-substituted benzoxazoles were affected by the yield of N-alkylation compound from o-aminophenol and alcohol as starting materials. During the reaction, a stoichiometric amount of hydrogen was spontaneously evolved into the gas phase.

• Bulletin of the Korean Chemical Society
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• v.29 no.9
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• pp.1765-1768
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• 2008

Functionalized benzoxazole derivatives were designed and synthesized based on the structural features of PIB and FDDNP, which show excellent binding affinities to aggregated A$\beta$ 42 fibrils. All the synthesized compounds were evaluated by competitive binding assay against aggregated A$\beta$ 42 fibrils using [$^{125}$I]TZDM and displayed good in vitro binding affinities with Ki values (0.47-15.3 nM) from subnanomolar to nanomolar range. Among them, benzoxazoles 1f and 1a having malononitrile and ester moieties at C-6 exhibited superior binding affinities ($K_i$ = 0.47 and 0.61 nM, respectively) to PIB ($K_i$ = 0.77 nM).

• Journal of the Korean Chemical Society
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• v.57 no.2
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• pp.221-226
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• 2013

A series of some novel 2-[5-(substituted phenyl)-[1,3,4]oxadiazol-2-yl]-benzoxazoles were synthesized by using benzoxazole-2-carboxylic acid on reaction with thionyl chloride in presence of ethanol solvent at room temperature gave benzoxazole-2-carbonyl chloride, which is turned into benzoxazole-2-carboxylic acid hydrazide on reaction with hydrazine hydrate in ethanol solvent under reflux. The subsequent treatment of benzoxazole-2-carboxylic acid hydrazide with an appropriate aromatic carboxylic acid in presence of polyphosparic acid under reflux afforded the title compounds. The chemical structures of the newly synthesized compounds were elucidated by their IR, $^1H$ NMR and Mass spectral data analysis. Further the compounds are used to find out their ability towards anti microbial and nematicidal activity.