✦ LIBER ✦

Zum Mechanismus der Imidazol-Katalyse der Cyclo-trimerisation und cis-trans Umlagerung von Maleinsäure-Derivaten

✍ Scribed by Th. Wagner-Jauregg; Q. Ahmed

Publisher: John Wiley and Sons
Year: 1974
Tongue: German
Weight: 119 KB
Volume: 57
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19740570638

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✦ Synopsis

Abstract

A plausible explanation of the reaction mechanism is given based on addition intermediates with zwitter ion structure.

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Imidazole als Induktoren der Cyclo-Oligo

Imidazole als Induktoren der Cyclo-Oligomerisation von N-Alkyl-maleinimiden und der cis-trans, Umlagerung von Maleinsäure-dimethylester

✍ Th. Wagner-Jauregg; Q. Ahmed; E. Pretsch 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 German ⚖ 445 KB

## Abstract N‐Methylimidazole (**N**–**M**), in boiling acetonitrile, catalyzes the oligomerization of N‐alkyl maleimides (**2**) to tri‐, tetra‐, penta‐ and hexamers. In the presence of small amounts of hydroquinone the trimers of **2** are formed, which have the structure of N,N′,N″‐trialkyl‐cycl