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The first synthesis of 3-hydroxy-2-(polyfluoroalkyl)chromones and their ammonium salts. 3-hydroxychromone in the Mannich reaction

✍ Scribed by Roman A. Irgashev; Vyacheslav Ya. Sosnovskikh; Anna A. Sokovnina; Gerd-Volker Röschenthaler

Book ID: 102343996
Publisher: Journal of Heterocyclic Chemistry
Year: 2010
Tongue: English
Weight: 279 KB
Volume: 47
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.386

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✦ Synopsis

Abstract

magnified image 3‐Hydroxy‐2‐(polyfluoroalkyl)chromones were obtained in good yields via the nitrozation reaction of 2‐(polyfluoroalkyl)chroman‐4‐ones with isopropyl nitrite in the presence of hydrochloric acid. Treatment of 3‐acetoxy‐2‐(trifluoromethyl)chromone with primary amines and hydrazine gave the corresponding ammonium salts. Reaction of 3‐hydroxychromone, prepared by this method, with formaldehyde and α‐aminoacids has been studied. J. Heterocyclic Chem., (2010).

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