A Novel Isocyanate Reaction − The Formation and Structure of Unexpected Cycloadducts
✍ Scribed by Helmuth Tietz; Otto Rademacher; Gernot Zahn
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 419 KB
- Volume
- 2000
- Category
- Article
- ISSN
- 1434-193X
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Dedicated to Professor Hans-J¸rgen Hansen on the occasion of his 65th birthday The 1,3-dipolar cycloaddition of 2,2,4,4-tetramethyl-3-thioxocyclobutanone S-methylide (2a), generated in situ by thermal extrusion of N 2 from the corresponding 2,5-dihydro-1,3,4-thiadiazole 1a, with electron-defici
The reactions of the title compounds are governed by sulfur redox chemistry. Thus, cyanothioformamide 2 reacts with aryl isocyanates 3a-c to give bis[3-aryl-1-(arylcarbamoyl)-2oxo-4-(arylcarbamoylimino)imidazolidin-5-yl] disulfides 6, as shown by an X-ray crystallographic investigation of product 6a