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2-Benzopyrylium salts. 24. Synthesis and reactions of 3-(2-methylenecarboxyaryl)-2-benzopyrylium salts with amines

✍ Scribed by I. V. Shcherbakova; G. N. Dorofeenko; E. V. Kuznetsov

Book ID: 112348757
Publisher: Springer US
Year: 1981
Tongue: English
Weight: 330 KB
Volume: 17
Category: Article
ISSN: 0009-3122
DOI: 10.1007/bf00505980

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Nucleophilic aldition of u cyanide anion to 2-benwpyryliwn salt8 I takes place at the firet position end led8 to stable i8ochzvmene8 II, which are oxygen anabgs of Reissert aqXUnd8. The structure II uaa a~nfirmed by IR, 'H-NM? and '3C-NMR spectra. The tatter epectra reveal clearly the cyarr, gzup (w