RESEARCH ARTICLE

 

An efficient and green procedure for the preparation of acylals from aldehydes catalyzed by alum [KAl(SO₄)₂-12H₂O]

 

 

Kiran Shelke; Suryakant Sapkal; Amol Kategaonkar; Bapurao Shingate; Murlidhar S. Shingare

Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad (M.S.) 431 004, India

 

 

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ABSTRACT

Alum [KAl(SO₄)₂-12H₂O] is an inexpensive, efficient, non-toxic and mild catalyst for the preparation of acylals from aromatic and heteroaryl aldehydes with acetic anhydride at room temperature under solvent-free conditions. This method gives remarkable advantages such as excellent chemoselectivity, mild reaction conditions, short reaction times and excellent yields, and offers a green synthetic solution by avoiding toxic catalysts and hazardous solvents.

Keywords: Alum, acylals, aromatic and heteroaryl aldehydes, solvent-free synthesis, room temperature

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Acknowledgements

We gratefully acknowledge the funding support received for this project from the University Grants Commission, New Delhi.

 

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Received 12 December 2008
Revised 19 May 2009
Accepted 28 May 2009

 

 

* To whom correspondence should be addressed. E-mail: msshingare_org@rediffmail.com