✦ LIBER ✦
Pyrrole aus einem 3-Amino-3-arylazo-propensäuremethylester und α-Halogencarbonylverbindungen und die Bildung des Pyrrolo[3.2-e][1,2,4]-triazin-Ringsystems
✍ Scribed by Dr. Klaus Kirschke; Dr. Burkhard Costisella; Dipl. Kristallogr. Matthias Ramm; Burkhard Schulz
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 262 KB
- Volume
- 332
- Category
- Article
- ISSN
- 1615-4150
No coin nor oath required. For personal study only.
✦ Synopsis
Pyrroles from Methyl 3‐Amino‐3‐arylazo‐propenoat and α‐Halogenocarbonyl Compounds and the Forming of the Pyrrolo[3.2‐e][1,2,4]‐triazin Ring System
Methyl 3‐amino‐3‐(2,4,6‐trichlor‐phenylazo)propenoat (2) and α‐halogenocarbonyl compounds (4a–c) undergo cyclization to pyrroles on the pattern of the Hantzsch‐pyrrole‐synthesis. The 2‐(2,4,6‐trichlor‐phenylazo)‐3‐pyrrolecarboxylic azide (7) reacts under Curtius rearrangement and cyclization to the ring system of the pyrrolo[3.2‐e][1,2,4]‐triazin (8).