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One-Pot Synthesis of New 3-Substituted Coumarins by Tandem Reactions.

✍ Scribed by Khadidja Bourahla; Mustapha Rahmouni; Joan Fraga-Dubreuil; Jean Pierre Bazureau; Jack Hamelin

Publisher
John Wiley and Sons
Year
2007
Weight
24 KB
Volume
38
Category
Article
ISSN
0931-7597

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One-pot synthesis of new 3-substituted c
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✍ Khadidja Bourahla; Mustapha Rahmouni; Joan Fraga-Dubreuil; Jean Pierre Bazureau; 📂 Article 📅 2007 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 406 KB 👁 1 views

## Abstract magnified image The synthesis of new 3‐substituted coumarins appended to imidazolium, pyridinium, 3‐dimethylamino pyridinium, 3‐chloro pyridinium and 3‐bromo pyridinium salts is reported. These salts were prepared by tandem reactions, followed by quantitative anionic metathesis. The st

One pot synthesis of diarylpyrido[3,2-c]
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## Abstract magnified image Various diarylpyrido[3,2‐__c__]coumarins **3a‐l** have been synthesized in one step by reacting 4‐hydroxy coumarins **1a‐d** with α,β‐unsaturated ketones **2a‐c** in the presence of ammonium acetate and acetic acid under Kroehnke's reaction conditions.