Catalysis Database

Catalysis by materials for fine chemicals production

V. , Murugesan and K.K. , Cheralathan and M, Karthik (2004) Catalysis by materials for fine chemicals production. Bulletin of the Catalysis Society of India, 3 . pp. 23-42.

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Abstract

Liquid phase alkylation of phenol with 4-hydroxybutan-2-one, cyclisation of (phenylthio)acetaldehyde diethylacetal and elcectrophilic substitution of indole with a variety of aromtic aldehydes were investigated over Hβ, HY, H-ZSM-5, ion-exchanged β and Y zeolites and modified zeolites. Raspberry ketone was obtained regioselectively over Hβ (Si/Al=10) catalyst in 77 % yield. This product is formed not only by direct alkylation but also by the facile rearrangment of O-alkylated product. Zn2+ ion-exchanged β and Y zeolites showed better activity than its H-form counterpart owing to its higher Lewis acidity in the formation of benzo[b]thiophene and bis(indolyl)methanes respectively.

Item Type:Article
Subjects:Science > Chemistry
ID Code:191
Deposited By:INVALID USER
Deposited On:28 Feb 2007 16:35
Last Modified:28 Feb 2007 16:35

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