A novel and versatile synthesis of heterocyclic aldehydes using dialkyl 3-oxo-1-alkenyl-phosphonates.
✍ Scribed by Elisabeth Öhler; Erich Zbiral; Mahmoud El-Badawi
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- French
- Weight
- 217 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract Condensation of 3‐formyl chromone **1** with hydroxylamine hydrochloride afforded the corresponding oxime **2** that was converted to nitrile **3**. Refluxing of oxime **2** and/or nitrile **3** with aceturic or hippuric acid gave **16** and **17**. Treatment of **1** with semicarbazide
## Abstract magnified image One‐pot reaction of 3‐aryl‐5‐methyl‐1,3,4‐oxadiazolin‐2‐ones **1a‐g** with ethanolamine yielded the 4‐(2‐hydroxyethyl)‐2‐aryl‐5‐methyl‐2,4‐dihydro‐3__H__‐1,2,4‐triazolin‐3‐ones **2a‐g** which were converted to the azido compounds **6a‐g**. These azides on 1,3‐dipolar cy