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DOI: 10.1055/s-2007-986674
The Bohlmann-Rahtz Pyridine Synthesis: From Discovery to Applications
Publication History
Received
12 March 2007
Publication Date:
13 September 2007 (online)


Abstract
The results of our research into the Bohlmann-Rahtz pyridine synthesis are summarized. The historic discovery of this reaction and its mechanism are discussed; followed by recent improvements in methodology, such as Brønsted and Lewis acid catalysis, microwave assistance, process in a continuous flow reactor, and incorporation into multicomponent and tandem reactions. Applications of these methods in the synthesis of pyrido[2,3-d]pyrimidines, combinatorial pyridine libraries, heterocyclic α- and γ-amino acids, α-helix mimetics, and complex natural products are discussed, along with a consideration of future perspectives.
1 Discovery
2 Recent Improvements in Methodology
2.1 Catalyst and Solvent Effects
2.2 Tandem Bohlmann-Rahtz Processes
2.3 Microwave Dielectric Heating
2.3.1 Batch Reactors
2.3.2 Continuous-Flow Reactors
3 Recent Applications
3.1 Pyridine Libraries and Scaffolds
3.2 Fused Heterocycles
3.3 Natural Product Chemistry
4 Conclusion and Perspectives
Key words
pyridines - heterocycles - enamines - multicomponent reactions - microwave synthesis - natural products