V. Dhumal, S. Shingote, V. Rane, Akshay Bhandare, K. Tayade, A. Kelkar
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Exploration on Clean Synthesis of Diphenylmethane Using Ionic Liquid: A Subtle Catalysis
In present work, Friedal-Craft alkylation of benzene using benzyl alcohol and dibenzyl ether (DBE) has been investigated using Brønsted acidic ionic liquid as a catalyst. It results in 99% conversion of benzyl alcohol, depicting 61% selectivity towards diphenylmethane (DPM) using [CSO3Hmim][La(CF3SO3)4] as a catalyst within 18 h. Using the same catalyst, 62% selectivity towards DPM has been obtained with DBE as benzylating agent within 16 h. Effect of various reaction conditions on the activity and selectivity was investigated using [C3SO3Hmim][La(CF3SO3)4] as a catalyst with DBE as benzylating agent.
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