الفهرس 
Synthesis of pyrans and fused pyranOnly 14 pages are availabe for public view
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Abstract
As part in our continue efforts on the development of new routes for the synthesis of biologically active heterocyclic compounds, we have already here reported the procedure for synthesis of 2-amino-4H pyran-3-carbonitrile was achieved by the three-component one-pot reaction of terephthaldehyde malononitrile, and nucleophiles (i.e. 3-aminophenol, 3-acetylpyridine, dimidone, resorcinol,) in the presence of 15 mol% catalyst. The reaction was carried out in aqueous ethanol at room temperature using DAHP as a catalyst to give products in good to high yields.
In this part we have explored click approach for the rapid synthesis and discovery of important classes of organic compounds containing chromene and triazole heterocycles.We expected that the method described in this context will find wide spread application in the emerging field molecular architectures.
This part deals with the conjugation between triazoles and Schiff bases for extraction and removal of metal ions.