Journal
ORGANIC LETTERS
Volume 11, Issue 4, Pages 1019-1022Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol8029609
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Funding
- Deutsche Forschungsgemeinschaft
- Fonds der Chemischen Industrie
- Deutsche Akademische Austauschdiens
- Alexander von Humboldt Foundation
- Alfried Krupp von Bohlen and Halbach Foundation
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A versatile and modular one-pot method for the preparation of differently substituted symmetrical and unsymmetrical imidazolium salts is reported, and 19 examples are given. In the key step, readily available formamidines and alpha-halo ketones are coupled to give imidazolinium salts 3, followed by imidazolium salt formation by acylation-induced elimination. For many substitution patterns of the imidazolium salt products, this efficient strategy compares favorably with well-known processes in terms of yield, ease of synthesis, and robustness.
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