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Three component one-pot synthesis of 4H-benzo-[b]-pyran derivatives using [(diacetoxyiodo)benzene] (DIB) as a hypervalent iodine catalyst | ||
| Iranian chemical communication | ||
| مقاله 2، دوره 3، Issue 4, pp. 283-387, Serial No. 9، دی 2015، صفحه 291-301 اصل مقاله (125.55 K) | ||
| نوع مقاله: Original Research Article | ||
| نویسندگان | ||
| Amit S. Waghmare* ؛ Shivaji S. Pandit | ||
| Department of Chemistry, Padmashri Vikhe Patil College of Arts, Science and Commerce, Pravaranagar, 413713 Maharashtra, India | ||
| چکیده | ||
| The three components one pot synthesis of 2-amino-4H-benzo-[b] -pyran derivatives were obtained in good to excellent yields within short reaction time by condensing dimedone, aldehydes and malanonitrile or ethylcyanoacetate using a catalytic amount of (diacetoxyiodo)benzene as hypervalent iodine in aqueous ethanol under reflux conditions have been discussed. This aqua mediated Knoevenagel-cyclocondensation of various aromatic and hetero-aromatic aldehydes along with the aldehydes like aryl-sulphonyloxybenzaldehyde, aryl-carbonyloxybenzaldehyde also leads to the product under the same reaction conditions. High yields, shorter reaction times, one pot condensation, operational simplicity, easy work-up, purification of products by non-chromatographic methods are some additional features of the present protocol. | ||
| کلیدواژهها | ||
| 4H-benzo-[b]-pyran؛ hypervalent iodine؛ aldehydes؛ dimedone؛ multi-component reaction؛ aqueous alcohol | ||
| مراجع | ||
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