Journal of Organic Chemistry p. 536 - 544 (1982)
Update date:2022-08-05
Topics:
Elguero, Jose
Ochoa, Carmen
Stud, Manfred
Esteban-Calderon, Carmen
Martinez-Ripoll, Martin
et al.
The chemical and structural properties of 18 1,2,6-thiadiazine 1,1-dioxides have been studied.By comparison with the corresponding pyrazoles it could be established that there are some analogies between pyrazoles and thiadiazine 1,1-dioxides, but because of the great difference in aromaticity, both series of heterocycles behave quite differently in other cases.However, a rough parallelism is observed in the tautomeric equilibrium, the 13C chemical shifts, and the reactivity of the 4-position.As a consequence, the hypothesis will be made that these similarities are general and could be extended to a whole variety of heterocyclic and alicyclic structures.
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