We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
2,5-dihalothiophenes in the reaction with chlorosulfonic acid.
- Authors
Rozentsveig, I. B.; Aizina, Yu. A.; Chernyshev, K. A.; Klyba, L. V.; Zhanchipova, E. R.; Sukhomazova, E. N.; Krivdin, L. B.; Levkovskaya, G. G.
- Abstract
The mixtures of mono-and dihalothiophenesulfonyl chlorides, formed in the sulfochlorination reaction of 2,5-dichlorothiophene and 2,5-dibromothiophene, were treated with aqueous ammonia and thus converted into mixtures of the corresponding stable thiophenesulfonamides. The structure and composition of the latter were studied by physicochemical methods: GC-MS and 1H, 13C, 1H-13C HSQC, 1H-13C HMBC, and NOESY NMR spectroscopy. As a result of the above chemical transformations, 2,5-dichlorothiophene afforded a mixture of 5-chlorothiophene-2-sulfonamide and 4,5-dichlorothiophene-3-sulfonamide in a roughly 70:30 ratio. In the case of 2,5-dibromothiophene, a mixture of 5-bromothiophene-2-sulfonamide, 4,5-dibromothiophene-3-sulfonamide, and 3,5-dibromothiophene-2-sulfonamide (3:54:43) was formed.
- Subjects
CHLOROSULFONIC acid; INORGANIC acids; AMMONIA; CHEMICAL structure; CHEMISTRY; NUCLEAR magnetic resonance spectroscopy
- Publication
Russian Journal of General Chemistry, 2007, Vol 77, Issue 5, p926
- ISSN
1070-3632
- Publication type
Article
- DOI
10.1134/S1070363207050192