Eine einfache Methode zur Herstellung von Benzoxazolen
✍ Scribed by Zdenek Seha; Claus D. Weis
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- German
- Weight
- 411 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
A Facile Method for the Synthesis of Benzoxazoles
The preparation of benzoxazoles by a facile one‐pot reaction is reported. The reaction of carboxylic acids with 2‐chloro‐N‐methyl‐Δ^1^‐pyrrolinium chloride in an excess of N‐methyl‐2‐pyrrolidone afforded carboxylic acid chlorides which were converted subsequently to their 2‐hydroxyanilides by addition of 2‐aminophenols. Cyclization of the 2‐hydroxy‐anilides at elevated temperatures furnished the benzoxazoles in high yield and purity.
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