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Mechanismus der decarboxylativen Dimerisierung von Maleinsäureanhydrid zu Dimethylmaleinsäureanhydrid unter Einfluss von 2-Aminopyridin

✍ Scribed by Marcus E. Baumann; Hans Bosshard; Werner Breitenstein; Grety Rihs; Tammo Winkler

Publisher
John Wiley and Sons
Year
1984
Tongue
German
Weight
541 KB
Volume
67
Category
Article
ISSN
0018-019X

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✦ Synopsis

Mechanism of the Decarboxylative Dimerization of Maleic Anhydride to Dimethylmaleic Anhydride under the Influence of 2‐Aminopyridine

The mechanism of the decarboxylative dimerization of maleic anhydride to dimethylmaleic anhydride was investigated. It was shwon that imidazo[1,2‐a] pyridines play an important role as intermediates in this rather unusual transformation, the key step being a Michael addition of 5 to maleic anhydride.

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Eine decarboxylative Dimerisierung von M
Eine decarboxylative Dimerisierung von Maleinsäureanhydrid zu Dimethylmaleinsäureanhydrid
✍ Marcus E. Baumann; Hans Bosshard 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 German ⚖ 178 KB

**Decarboxylative Dimerization of maleic Anhydride to Dimethylmaleic Anhydride** We have found a simple synthesis of dimethylmaleic anhydride (**1**). Treatment of maleic anhydride (**2**) in boiling acetic acid in presence of 2‐aminopyridine gives, with decarboxylation, **1** in a one‐pot reaction