Multiple 1,2,3-thiadiazoles
✍ Scribed by Mousa Al-Smadi; Norbert Hanold; Herbert Meier
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1997
- Tongue
- English
- Weight
- 553 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0022-152X
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✦ Synopsis
Abstract
A series of compounds 3a‐d,i‐n with two or three 1,2,3‐thiadiazole rings, useful for photocrosslinking processes, was prepared from the di‐ or triketones 1a‐d,i‐n via the corresponding hydrazones 2a‐d,i‐n by applying the Hurd‐Mori method. A special synthetic sequence, 1e, 2e, 3e, 3f/3g, was elaborated for the olefinic system 3h.
📜 SIMILAR VOLUMES
## Abstract Die Photolyse der 1,2,3‐Thiadiazol‐2‐oxide **2** ergibt hauptsächlich die isomeren 3‐Oxide **6** und die und die 1,2,3‐Thiadiazole **1**. Die intramolekularen Cycloadditionsmechanismen für die Ringgerüstumlagerung sowie die Eigenschaften der 1,2,3‐Thiadiazol‐3‐oxide **6** werden ausführ
## Abstract Die Photolyse der 1,2,3‐Thiadiazol‐1,2,3‐trioxide **4** führt über Gerüstumlagerungen zur Fragmentierung in die Nitrile **5** und die 1,3,2,4‐Dioxathiazol‐2‐oxide **6** **15**. Durch thermische SO~2~‐Cycloeliminierung erhält man aus **15** in Gegenwart von Wasser die Hydroxamsäuren **
A method of preparation for the title compounds 5, by bromination-dehydrobromination of the corresponding 5-alkyl-1,2,3-thiadiazoles 3, their spectroscopical characterization, and the reaction of 5 with 4-phenyl-4H-l,2,4-triazole-3,5-dione (6) with formation of 7, 8 is described. 1,2,3-Thiadiazole