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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 19, 1989 - Issue 18
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Original Articles

Facile Regioselective Synthesis of Pyrano[3,2-c][1]benzo-thiapyran-5(2H)-one and 2-Methyl Furo[3,2-c][1] Benzothiapyran-4-one

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Pages 3249-3257 | Received 30 Jun 1989, Published online: 24 Oct 2006
 

Abstract

The hitherto unreported title compounds were obtained in good yields by the application of [3,3]sigmatropic rearrangement on 4-]2′-propynyloxy] [1]benzothiapyran-2-one and 4-[2′-propenyloxy][1]benzothiapyran-2-one or 4-[2′-chloro-2′-propenyloxy][1]benzothiapyran-2-one respectively.

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