Ultrasound and microwave activated preparation of ZrO 2-pillared clay composite: catalytic activity for selective, solventless acylation of 1, n-diols

The successful preparation of ZrO 2-pillared clay composite by a new and efficient strategy employing ultrasonication in conjunction with microwave heating is reported. It is catalytically active for the selective mono-acylation of symmetrical 1, n-diols in solventless conditions under microwave irr...

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Bibliographic Details
Published inJournal of molecular catalysis. A, Chemical Vol. 210; no. 1; pp. 119 - 124
Main Authors Singh, Vasundhara, Sapehiyia, Varinder, Kad, Goverdhan Lal
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2004
Subjects
1, n-diols
Microwave irradiation
Mono-acylation
Preparation of ZrO 2-pillared clay catalyst
Solventless conditions
Sonication
Sonication
Microwave irradiation
1, n-diols
Solventless conditions
Preparation of ZrO 2-pillared clay catalyst
Mono-acylation
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Summary:The successful preparation of ZrO 2-pillared clay composite by a new and efficient strategy employing ultrasonication in conjunction with microwave heating is reported. It is catalytically active for the selective mono-acylation of symmetrical 1, n-diols in solventless conditions under microwave irradiation. We herein report for the first time, a new and efficient method using ultrasonic activation for intercalation by ion exchange and microwave heating for formation of zirconium polyoxycationic species in the preparation of ZrO 2-pillared clay composite with improved physico-chemical properties and significant reduction in processing time. Acetic anhydride under solventless conditions with microwave irradiation in the presence of ZrO 2-pillared clay was used for the mono-acylation of diols and alcohols in very good yield.
ISSN:1381-1169
1873-314X
DOI:10.1016/j.molcata.2003.09.006