Highly efficient catalytic oxidation of cyclohexanol with TBHP over Cr-13X catalysts in a solvent-free system

Selective Oxidation of Cyclohexane to Cyclohexanone Using Chromium Oxide Supported Mesoporous MCM‐41 Nanospheres: Probing the Nature of Catalytically Active Chromium Sites

“…To validate the performance of our CrO x ‐MCM‐41 catalysts for their high selectivity towards cyclohexanone from cyclohexane with a comparable conversion, activity results were compared with previous reports on Cr‐based silica catalysts in which TBHP, H 2 O 2 , and air were used as oxidants (Table , entries 12–16). Generally, cyclohexanone was the major product obtained if TBHP was used as the oxidant, which is in agreement with previous reports . From previous studies, the active site for cyclohexane oxidation on Cr‐MCM‐41 catalysts was the tetrahedral Cr species in the silica framework …”

[DDQM][HSO4]/TBHP as a Multifunctional Catalyst for the Metal Free Tandem Oxidative Synthesis of 2-Phenylquinazolin-4(3H)-ones

“…This may be due to the formation of more stable radicals by TBHP than the homologous H 2 O 2 . 19 To determine whether the reaction was catalyzed by the ionic liquid or KHSO 4 , a control reaction was performed in which the superior catalytic activity of IL was observed over KHSO 4 (Table S1, entries 12 and 23). When the microwave power was decreased to <80 W or the reaction performed with 0 W power (Table S1, entry 17), the reaction did not proceed well, resulting a lower yield of the product as shown in Figure S7, which may be due to the insufficient diffusion of reactants in the IL.…”

“…The reaction condition was optimized by altering the oxidants, and TBHP was found to be the best oxidant for the protocol (Table S1, entries 15 and 16). This may be due to the formation of more stable radicals by TBHP than the homologous H 2 O 2 . To determine whether the reaction was catalyzed by the ionic liquid or KHSO 4 , a control reaction was performed in which the superior catalytic activity of IL was observed over KHSO 4 (Table S1, entries 12 and 23).…”