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Quelques réactions nuclé ophiles et électrophiles de la thiéno[2,3-b]pyrazine. Comparaison de sa réactivite avec celles de thiéno diazines et de la thiényl-2 pyrazine dans le cas de la nitration

✍ Scribed by Jean Bourguignon; Marc Lemarchand; Guy Quéguiner


Book ID
112126092
Publisher
Journal of Heterocyclic Chemistry
Year
1980
Tongue
English
Weight
381 KB
Volume
17
Category
Article
ISSN
0022-152X

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## Abstract The rates of reaction of 2‐, 3‐ and 4‐chloropyridine N‐oxides towards 1 M piperidine in methanol have been measured conductimetrically. Apparent unimolecular rate constants at 80°C are respectively 3,70.10^−4^, 1,04.10^−7^ and 1,02.10^−4^ sec^−1^. The reactivity sequence 2 > 4 >> 3 is d