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Synthesis of cyclobutenes by the novel photochemical ring contraction of 4-substituted 2-amino-3,5-dicyano-6-phenyl-4H-pyrans

โœ Scribed by Armesto, Diego; Horspool, William M.; Martin, Nazario; Ramos, Ana; Seoane, Carlos


Book ID
115446869
Publisher
American Chemical Society
Year
1989
Tongue
English
Weight
566 KB
Volume
54
Category
Article
ISSN
0022-3263

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Synthesis of heterocyclic compounds VII.
โœ M. Quinteiro; C. Seoane; J.L. Soto ๐Ÿ“‚ Article ๐Ÿ“… 1977 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 121 KB

Only few methods for 4H-pyran synthesis are known. In them, carbonyl compounds (Z-4). pyrylium salts (5-7) or y-pyrones (8.9) a're used as starting materials.