Alkylation of phenol with cyclohexene catalysed by cationic ion-exchange resins and acid-treated clay: O- versus C-alkylation

Chakrabarti, Animesh ; Sharma, Man Mohan (1992) Alkylation of phenol with cyclohexene catalysed by cationic ion-exchange resins and acid-treated clay: O- versus C-alkylation Reactive Polymers, 17 (3). pp. 331-340. ISSN 0923-1137

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0923-1137(92)90279-B

Abstract

Alkylation of phenol with cyclohexene was carried out in the presence of different cation-exchangers and acid-treated clay (Filtrol-24) as catalysts in the temperature range 45-120°C. The role of homogeneous catalysts such as 50% aqueous solution of ρ-toluenesulfonic acid (PTSA) and 98% H2SO4 was also assessed. This reaction is unique in that a substantial amount of cyclohexyl phenyl ether is formed at lower temperature, which may well have good perfumery value. Amberlyst-15 was the best catalyst so far as the activity was concerned. Selective Ο-alkylation can be obtained in the presence of Filtrol-24 as catalyst in the temperature range 45-60°C. The suitability of cyclohexanol as the alkylating agent was assessed. It can be used for C-alkylation in the temperature range 180-250°C in the presence of Filtrol-24 as catalyst.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Ion-exchange Resin; Acid-treated Clay; O-alkylation; Cyclohexyl Phenyl Ether; Cyclohexylphenols
ID Code:46203
Deposited On:02 Jul 2011 10:50
Last Modified:07 Jul 2011 04:48

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