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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 29, 1999 - Issue 8
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Original Articles

Oxidative Cyclisation of 6 or 8 Allyl-7-Hydroxychromones: Synthesis of Pyronochromones and Hydroxymethyl Dihydrofuranochromones

Ramachandra Puranik Department of Chemistry, Osmania University, Hyderabad, 500 007, India
,
Y. Jayaprakash Rao Department of Chemistry, Osmania University, Hyderabad, 500 007, India
&
G. L. David Krupadanam Department of Chemistry, Osmania University, Hyderabad, 500 007, India
Pages 1355-1367 | Received 06 Oct 1998, Published online: 17 Sep 2007
 
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Abstract

6/8-Allyl-7-hydroxychromones (1a-d) on oxidative cyclization with DDQ in benzene afforded pyronochromones (2a-d) while the oxidative cyclization of 1b-e with m-CPBA in CH2Cl2 gave hydroxymethyl dihydrofurano chromones (3b-e).

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