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Reactions of pyranylidenemethylpyrylium salts with ammonia and amines |
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| Authors: | J A Van Allan G A Reynolds |
| Abstract: | Pyranylidenemethylpyrylium salts (1) react with ammonia to give pyranylidenepyridines as a result of the replacement of one of the oxygen atoms of 1 by nitrogen. Aliphatic primary amines react with 1 by replacing both of the oxygen atoms by nitrogens. Aniline and 1 give the monoreplacement product. Pyranylidenemethylthiopyrylium salts have only the oxygen atom replaced by reaction with primary aliphatic amines. |
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