Abstract
In the absence of any solvent, a series of spiro-2-amino-4H-pyrans derivatives were synthesised via the three component reaction of malononitrile and α-methylencarbonyl compounds/enol with 9,10-phenanthroquinone or ace-naphthenequinone using 1-butyl-3-methylimidazolium hydroxide ([bmim][OH]) as a basic ionic liquid catalyst. This method has some distinct advantages such as mild reaction conditions, short reaction time and is environmentally friendly.
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