OICC Press Journal of Nanostructure in Chemistry 2193-8865 5 3 (September 2015) 2015 06 21 Nano-sawdust–BF3 as a new, cheap, and effective nano catalyst for one-pot synthesis of 2-amino benzo[h]chromene derivatives 10.1007/s40097-015-0162-1 EN Bahareh Sadeghi Department of Chemistry, Yazd Branch, Islamic Azad University, Yazd, IR Iman Zarepour Department of Chemistry, Yazd Branch, Islamic Azad University, Yazd, IR Journal Article 2015 06 21 Abstract An atom-efficient, three-component synthetic methodology has been developed for the preparation of biologically important 2-amino benzo[ h ]chromene using nano-sawdust–BF 3 as a new catalyst. The reaction involves the use of 2-naphthol, malononitrile, and various aldehydes. A wide range of aldehydes is compatible in this reaction, producing excellent yields in short time. The morphology of nanocatalyst (nano-sawdust–BF 3 ) was observed using a scanning electron microscopy. Also, the sawdust–BF 3 surface was studied by energy dispersive X-ray spectroscopic method to find out the chemical composition.