5,7-Di-tert-butyl-2-(2-pyridyl)benzo[d]oxazole

Abstract

The multiple‐bond character of the C—C bond connecting the pyridine and benzoxazole ring systems results in an overall planarity of the central aromatic part of the title compound, C20H24N2O. The crystal structure is stabilized by intermolecular C—H...N close contacts, linking molecules into layers.

Cobalt(II)-mediated synthesis of 2,6-bis[5,7-di-tert-butyl-1,3-benzoxazol-2-yl]-pyridine: Structural analysis and coordination behavior

“…Therefore the solid state conformation of compound L3 motivated us to calculate the energy of the three planar conformers, to investigate if the solid state conformation of L3 was the result of the crystal packing or the free enthalpy energy of the conformers. Examination of the data from the Cambridge Crystallographic Data Center showed that there is only another X-diffraction structure of a free benzoxazole-pyridine (2-benzoxazolepyridine) [40], in spite of several examples of coordination compounds with benzoxazole pyridine derivatives [41]. It is important to note that the conformation of this benzoxazole has the oxygen atom pointing towards the pyridine nitrogen.…”

“…The electron delocalization in compound L3 is denoted by its planarity and the bond lengths [40,41]. The double bond nature of the oxazole C8AN9 bond is confirmed by the bond length [1.295(2) Å], while C8AO7 has a slightly longer bond distance [1.369(2) Å], is typical of a single bond between sp 2 atoms.…”

3-Benzyl-5-methyl-1,2-benzoxazole 2-oxide

“…For their antituberculer activity, see: Vinšová et al (2007). For other biological activties of isoxazoles and benzisoxazole derivatives, see: Veera Reddy et al (2011).…”

“…(Vinšová et al, 2007). Some benzoxazoles exhibit high fluorescence and are used as optical whitening agents, photoluminesents and active components in dye lasers.…”