Triethylammonium Acetate [TEAA]: An Efficient Catalyst for One Pot Synthesis of Tetrahydro-4H-chromene Derivatives
Ravi Balaskar, Sandip Gavade, Madhav Mane, Pramod Pabrekar, Murlidhar Shingare and Dhananjay Mane
Affiliation: Organic Research Laboratory, S.C.S. College, Omerga-413 606, (MS), India.
Keywords: Triethylammonium acetate (TEAA), tetrahydro-4H-chromenes, room temperature, malononitrile, Beckmann rearrangement, Polyhydroquinoline, Esterification, aldol reactions, Reaction, Transesterification
An efficient and convenient approach towards the synthesis of series of tetrahydro-4H-chromenes via one pot three component coupling reactions of aldehyde, dimedone and malononitrile carried out at room temperature in presence of triethylammonium acetate [TEAA] ionic liquid as a catalyst. Reusability of the catalyst with optimized reaction conditions has also been investigated. The present methodology was found to be economically feasible and environmentally benign.
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