**Furan‐Derivate** des Typs (__2__) erhält man durch Pyrolyse der 1,3‐Dioxolan‐Derivate (__1__). Die Methode hat den Vorteil daß die Ausgangsverbindungen (__1__) leicht zugänglich sind und daß man die Art des Substituenten R^4^ frei wählen kann.magnified image
Synthese von 1,3,4-Thiadiazol-derivaten
✍ Scribed by Dr. C. Tschierske; Dr. D. Girdziunaite
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 175 KB
- Volume
- 333
- Category
- Article
- ISSN
- 1615-4150
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract A new and highly versatile method for the synthesis of 1, 3, 4‐thiadiazol‐2 (3 __H__)ones **1** is described. Methoxy‐1,3,4‐thiadiazoles‐ **5**, which are readily available by condensation of __O__‐methyl thiocarbazate (**2**) with acid derivatives **3**, undergo an efficient cleavage t
Uberfiihrung uon l\*-3/?, 24-Dipcetoxy-21[ (bzw. 22[)-chZor-oleanen ( X I ) 5 , in A133 ausgefiihrt. SUMMARY Soyasapogenols A, B and C are derivatives of A12-3~-24-dihydroxy-oleanene differing in the state of oxidation of ring E. The empirical formula of soyasapogenol D has been revised to C,,H,,O,