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Your search keyword '"Rahaman, H."' showing total 2 results
Start Over Author "Rahaman, H." Journal synthetic communications
2 results on '"Rahaman, H."'

1. Solid-State Regioselective Cyclization Initiated by the Electrophilic Attack on the Double Bond by N-Bromosuccinimide on Montmorillonite K-10 Clay Support under Microwave Irradiation.

Author

Majumdar, K.C., Rahaman, H., and Roy, B.

Subjects
*RING formation (Chemistry), *BROMOSUCCINIMIDE, *MONTMORILLONITE, *COUMARINS, *IRRADIATION
Abstract

3-Allyl-4-hydroxy-coumarins and pyrones were regioselectively cyclized with N-bromosuccinimide (NBS) on solid phase under microwave irradiation in excellent yield. NBS on montmorillonite K-10 clay under microwave irradiation for expeditious solvent-free regioselective cyclization has been used for the first time. [ABSTRACT FROM AUTHOR]

Published
2007
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2. Synthesis of Potentially Bioactive Heterocycles: Thermal [3,3]Sigmatropic Rearrangement of 4‐(4′‐Aryloxybut‐2′‐ynyloxy)‐6‐methyl‐2‐pyridone.

Author

Majumdar, K. C., Rahaman, H., and Roy, B.

Subjects
*HETEROCYCLIC compounds, *PYRIDINE, *PYRIDONE, *CARBENES, *HYDROXYPYRIDONES
Abstract

Synthesis of a number of hitherto unreported 4-aryloxymethylene-7-methyl-2,3-dihydropyrano[3,2-c]pyridine-5-ones 4a–h have been achieved in moderate yields by the thermal [3,3]sigmatropic rearrangement of 4-(4'-aryloxybut-2'-ynyloxy)-6-methyl-2-pyridone. [ABSTRACT FROM AUTHOR]

Published
2006
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