ChemInform Abstract: A Novel Synthesis of 2-Aminochromones via Phosgeniminium Salts.
Abstract
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ChemInform Abstract
The conversion of the 2-hydroxyacetophenones (I) to their BF2-- complexes, followed by treatment with the phosgeniminium chlorides (II) and hydrolysis of the intermediate β-chloro vinylogous amide - BF2--complex produces the 2-aminochromones (III).