Formation of 2,3-Dihydrothiophene-3-carboxylates from 2(5H)-Thiophenones via Sequential Cyclization and Ring-Opening Reactions of 3-Thiahexa-1,5-dienyl Radicals. Preliminary Communication
✍ Scribed by René Kiesewetter; Paul Margaretha
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- German
- Weight
- 185 KB
- Volume
- 70
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract For Abstract see ChemInform Abstract in Full Text.
## Abstract Reactions of ethyl 3‐[(__E__)‐(dimethylamino)methylidene]pyruvate (**3**) and 3‐[(dimethylamino)methyl‐idene]‐2‐oxosuccinate (**4**) with hydrazine monohydrochloride (**5a**) and (hetero)arylhydrazines (**5b‐i**) afforded, regioselectively, 1‐substituted ethyl 1__H__‐pyrazole‐5‐carboxyl
The yields indicated were determined by GC analysis and, therefore, reflect ratios of products only. 'H-NMR from 1 :1 mixture of 10 and 9. Configuration at C(5) unknown. 'H-NMR from 3:l mixture of 14 and 13. Configuration at C(2) unknown