Ortho Alkylated Phenols. 2,6-Di-t-butylphenol

Photo-induced Reaction. II. The Photo-sensitized Oxidation of Hindered Phenols

“…The oxidation of 2, 6-di-tbutylphenol gives mainly 2, 6-di-t-butyl-pbenzoquinone (IV) and the diphenoquinone V 10, 13,[16][17][18] in accordance with the results we obtained in the photo-sensitized oxidation. Because of the capability of the formation of the benzyl radical XI the oxidation of 2, 6-di-t-butyl p-cresol (II) with various oxidants is complicated and the products are obtained usually in low yields.…”

The Tautomeric Persistence of Electronically and Sterically Biased 2‐Quinolinones

“…Isomer 3 (82 %) was isolated along with some 8-tert-butyl-2(1H)-quinolinone (1h; 11 %) after treatment of 5,8-ditert-butyl-3-fluoro-2(1H)-quinolinone (6) with sulfuric acid (98 %) (Scheme 5). A similar selective monodealkylation [64][65][66] applied to 5,7-di-tert-butyl-2(1H)-quinolinone (5) gave isomer 4 (14 %).…”

2-tert-Butyl-4,6-dinitrophenol

“…The title compound, (I), was ®rst prepared in 1938 (Ipatieff et al, 1938) by the nitration of 2,4-di-tert-butylphenol, with cleavage of the 4-tert-butyl group. It was later found that (I) could also be prepared by the nitration of 2,6-di-tert-butylphenol, with cleavage of the 6-tert-butyl group (Hart & Cassis, 1951). Attempts by Hart and Cassis at nitration without cleavage yielded small quantities of 3,3 H ,5,5 H -tetra-tert-butyl-pdiphenoquinone.…”