79991-31-4Relevant academic research and scientific papers
Organometallics in Carbon-Carbon Bond Formation in 1,2,6-Thiadiazine 1,1-Dioxides
Wang, Liv Ragna Rohde,Benneche, Tore,Undheim, Kjell
, p. 726 - 732 (2007/10/02)
Carbon substituents have been introduced exclusively into the electrophilic 5-position in 1,2,6-thiadiazine 1,1-dioxides by 1,1-adduct formation with organomagnesium reagents followed by reoxidation by manganese dioxide to the conjugated, 5-substituted heterocycle.Pd(II)-catalyzed coupling reactions between organostannanes and the 4-bromo of 4-iodo derivatives have been used for the introduction of a 4-carbon substituent.Methods for chlorination, bromination or iodination in the 4-position are described.
Synthesis and Physicochemical Properties of 1,2,6-Thiadiazine 1,1-Dioxides. A Comparative Study with Pyrazoles
Elguero, Jose,Ochoa, Carmen,Stud, Manfred,Esteban-Calderon, Carmen,Martinez-Ripoll, Martin,et al.
, p. 536 - 544 (2007/10/02)
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.
