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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 38, 2008 - Issue 5
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Original Articles

Aluminium Chloride–Catalyzed Claisen Rearrangement: Synthesis of Polyheterocycles Containing Oxygen, Nitrogen, and Sulfur

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Pages 754-766 | Received 03 Sep 2007, Published online: 15 Feb 2008
 

Abstract

Synthesis of 1,8‐naphthyridine‐annulated polyheterocycles containing oxygen, nitrogen, and sulfur has been achieved by thionation and sequential Claisen rearrangement of 4‐(4′‐aryloxybut‐2′‐ynyloxy)‐1‐phenyl[1,8]‐naphthyridin‐2‐ones first by heating in 1,2‐dichlorobenzene for 1–2 h and then by anhydrous AlCl3‐catalyzed Claisen rearrangement in dichloromethane for 1 h.

Acknowledgments

We thank the Council of Scientific and Industrial Research (CSIR) (New Delhi) for financial assistance. Two of us (R. I. and S. A.) are thankful to the CSIR (New Delhi) and the University Grants Commission (UGC) (New Delhi) respectively for their fellowships. We also thank the Department of Science and Technology (DST) (New Delhi) for providing UV‐vis and IR spectrometers under the Financial Assistance for Infrastructural Development of Science and Technology (FIST) Program.

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