oa South African Journal of Chemistry - Silica-supported yttrium nitrate hexahydrate as a heterogeneous catalyst for the synthesis of 2-amino-4-chromenes in water : research article



Silica-supported yttrium nitrate hexahydrate (Y(NO).6HO/SiO) has been found to be an efficient and reusable catalyst for the synthesis of 2-amino-4-chromenes a one-pot aqueous three-component reaction between arylaldehydes, malononitrile and β-naphthol in high yields. This method has many appealing attributes such as excellent yields, short reactions time, reusability of the catalyst and simple work-up procedure.


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