A convenient synthesis of benzopyranacetylenes

Sabitha, Gowravaram ; Muralidhar Reddy, M. ; Archana, B. ; Yadav, J. S. (1998) A convenient synthesis of benzopyranacetylenes Synthetic Communications, 28 (4). pp. 573-581. ISSN 0039-7911

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Official URL: http://www.tandfonline.com/doi/abs/10.1080/0039791...

Related URL: http://dx.doi.org/10.1080/00397919808005928

Abstract

Knoevenagel products 3 of 3-formylchromone (1) with isoxazol- 5-one 2, after reduction with NaBH4 and exposure to aqueous sodium nitrite/acetic acid and ferrous sulphate gave various benzopyranacetylenes 4 in good yield.

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