30311-98-9Relevant academic research and scientific papers
Cyclohexylation of resorcinol with cyclohexanol catalyzed by tungstophosphoric acid supported zirconia catalysts
Balasubramanian,Devassay,Halligudi,Deepika,Umbarakar,Vinu
, p. 2986 - 2992 (2018/01/10)
We demonstrate a highly active and reusable heterogeneous catalyst system, tungstophosphoric acid (TPA) supported on zirconia (ZrO2), for the cyclohexylation of resorcinol by cyclohexanol to produce value added chemicals such as 2-cyclohexyl resorcinol, 4-cyclohexyl resorcinol and 3-Hydroxy cyclohexyl phenyl ether under liquid phase reaction condition. TPA/ZrO2 catalysts prepared with different TPA loadings (5-30 wt.%) by wet impregnation method and calcined in the temperature range of 650-850°C were characterized by Nitrogen sorption analysis, XRD, FTIR, DTG and DTA, and 31P MAS NMR spectroscopy. Among the catalysts studied, 15 wt.%TPA/ZrO2 catalyst calcined at 750°C gave the highest conversion of resorcinol (51.2%) with the selectivities for 3-Hydroxy cyclohexyl phenyl ether (53.9%) and 2-cyclohexyl resorcinol and 4-cyclohexyl resorcinol together (46.1%) under optimum reaction conditions. However, the selectivity of the products were controlled by varying the reaction conditions. At higher conversion of resorcinol (78.9%), only C-alkylated products were formed at 200°C with 15 wt.%TPA/ZrO2 catalyst calcined at 750°C. The combination of TPA and ZrO2 coupled with calcination temperature offered an excellent platform for the conversion of resorcinol into O-or C-alkylated products.
Synthesis of cyclohexylphenols
Postnova,Koshel',Lebedeva,Kuznetsova,Koshel'
, p. 1415 - 1417 (2007/10/03)
Catalytic alkylation of phenols with cyclohexanol gives o- and p-cyclohexylphenols as the major products. The effect of temperature, catalyst nature, and reactant concentration on the reaction outcome was studied.
ALKYLATION OF PYROCATECHOL AND RESORCINOL WITH CYCLOHEXENE IN THE PRESENCE OF ALUMINUM PHENOLATE
Kozlikovskii, Ya. B.,Koshchii, V. A.,Butov, S. A.,Ovsiyuk, T. F.
, p. 746 - 749 (2007/10/02)
The alkylation of pyrocatechol and resorcinol with cyclohexene in the presence of aluminum phenolate leads to a mixture of isomeric mono- and dicyclohexyldihydroxybenzenes, in which as a rule the ortho-alkylation products predominate.
