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Push-pull-Butadiene. XI. Darstellung und Reaktionen von Methylsulfonylnicotinonitrilen

✍ Scribed by DOZ. Dr. sc. K. Peseke; Dr. U. Schönhusen


Book ID
105353743
Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
448 KB
Volume
332
Category
Article
ISSN
1615-4150

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✦ Synopsis


Push‐pull‐Butadienes. XI. Syntheses and Reactions of Methylsulfonylnicotinonitriles

Methylthionicotinonitriles 1, 3, 5, 9 and 12 react with potassium permanganate to give corresponding methylsulfonylnicotinonitriles 2, 4, 6, 10 and 13, respectively. Compounds 2 can be converted with sodium ethoxide to yield diethoxynicotinonitriles 7. Similarly 4, 5 and 6 react with sodium ethoxide to give 4‐aryl‐5‐bromo‐2,6‐diethoxy‐nicotinonitriles 8. Treatment of nicotinonitriles 9, 10 or 13 with sodium ethoxide gives diethoxynicotinonitriles 11. 2 with hydrazine hydrate together afford pyrazolo[3,4‐b]pyridines 14. However, an excess of hydrazine hydrate and 2 or 6 yields hydrazinopyrazolo[3,4‐b]pyridines 15.


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