“…After 30 min the reactions were complete and the solvent was evaporated. 1 H NMR spectroscopy allowed the identification of the products formed: 2,6-di-tert-butyl-4-nitrophenol (2) [21] and 2,6-di-tert-butyl-1,4-benzoquinone (4) [37] from 1a, 2,4-di-tert-butyl-6-nitrophenol (7) [21] and 3,5-di-tert-butyl-1,2-benzoquinone (8) [38] from 1b, 4-tertbutyl-2-nitrophenol (10) [39] and 4-tert-butyl-2,6-dinitrophenol (11) [40] from 1c, 2,4,6-tri-tert-butyl-4-nitrocyclohexadienone (12), [41] 2,4,6-tri-tert-butyl-4-hydroxycyclohexadienone (13), [42] 4, and 8 from 1c, and 2,6-di-tert-butyl-4-methyl-4-nitrocyclohexadienone (14) [43] and 2,6-di-tert-butyl-4-hydroxy-4-methylcyclohexadienone (15) [44] from 1e.…”