Acidity-activity relationships in the solvent-free tert-butylation of phenol over sulfated metal oxides

Csp2–H functionalization of phenols: an effective access route to valuable materials via Csp2–C bond formation

“…Among the catalysts studied, SnO 2 treated with 1.0 M H 2 SO 4 yielded the best results (70% phenol conversion with 10% of the mono-alkylated product) (Scheme 27c). 96 In the same year, Wang et al reported the vapor-phase alkylation of phenol with methanol using an HZSM-5-supported Ce-catalyst (Ce/HZSM-5). The authors disclosed that the preparation method signicantly affects the physicochemical properties of Ce/HZSM-5 resulting in different catalytic performances with variously functionalized phenols.…”

“…95 (c) Alkylation of phenol with t BuOH metal oxide catalysts (SnO 2 , TiO 2 and ZrO 2 ). 96 (d) Alkylation of phenol with methanol catalysed by Ce/HZSM-5. 97 Scheme 29 Alkylation of phenol with a-iodosulfones via a photocatalytic flow strategy.…”

“…Among the catalysts studied, SnO 2 treated with 1.0 M H 2 SO 4 yielded the best results (70% phenol conversion with 10% of the mono-alkylated product) ( Scheme 27c ). 96 …”