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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 41, 2011 - Issue 12
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Original Articles

Iodine- and Indium(III) Chloride–Catalyzed Facile Syntheses of 1,5- and 1,8-Naphthyridines

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Pages 1843-1851 | Received 05 Feb 2010, Published online: 29 Apr 2011
 

Abstract

Iodine- and InCl3-catalyzed facile syntheses of 1,5- and 1,8-naphthyridines from 3-aminopyridine and 2-aminopyridines are described. The catalyst InCl3 could be recovered and reused up to five times efficiently.

ACKNOWLEDGMENTS

We thank the Department of Science and Technology, New Delhi, India, for financial support of this project under the Green Chemistry Task Force Scheme (No. SR/S5/GC-02A/2006). K. C. is thankful to the Council of Scientific and Industrial Research, New Delhi, for his fellowship.

Notes

a Isolated yields in an average of minimum two runs.

b Not detected because of charring.

c Reaction carried out at a 5.0-g scale of 1, and yields reported are crude product.

a Isolated yields of purified product 8.

b Reaction carried out at 80 °C.

a Isolated yields of purified products.

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