- Synthesis, hydrolysis reactions and conformational study of 2-substituted 3,5-diamino-4-nitroso-2H-1,2,6-thiadiazine 1,1-dioxides
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The 2-substituted 3,5-diamino-4-nitroso-2H-1,2,6-thiadiazine 1,1-dioxides are present in solution as a mixture of two rotational conformers of the nitroso group that are stabilized by hydrogen bonds with the amino groups in positions 3 and 5.The stability
- Alkorta, Ibon,Garcia-Gomez, Concepcion,Paz, Jose Luis G. de,Jimeno, Maria Luisa,Aran, Vicente J.
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p. 293 - 298
(2007/10/03)
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- Reactivity of Cyanogen towards N-Substituted Sulfamides: Synthesis of 1,2,5-Thiadiazole 1,1-Dioxide Derivatives
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The acid-catalyzed cycloaddition of N-substituted sulfamides 1a-f with cyanogen affords 2-substituted 4-amino-2,3-dihydro-3-imino-1,2,5-thiadiazole 1,1-dioxides 5a-f which, in turn, could be easily hydrolyzed to give the corresponding 3-oxo derivatives 2a
- Alkorta, Ibon,Aran, Vicente J.,Davila, Elena,Ruiz, Jose R.,Stud, Manfred
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p. 1135 - 1138
(2007/10/02)
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- Ring Contraction of 1,2,6-Thiadiazines to 1,2,5-Thiadiazoles: Synthesis of 2-Substituted 4-Amino-2,3-dihydro-3-oxo-1,2,5-thiadiazole 1,1-Dioxides
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Nitrosation of 2-substituted 2,3,5,6-tetrahydro-3,5-dioxo-1,2,6-thiadiazine 1,1-dioxides (2a-d) yielded the corresponding 4-hydroximino derivatives (3a-d), which by mild acid treatment were converted into 2-substituted 4-amino-2,3-dihydro-3-oxo-1,2,5-thia
- Aran, Vicente J.,Bielsa, Agustin G.,Ruiz, Jose R.,Stud, Manfred
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p. 643 - 646
(2007/10/02)
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