Pseudoazulenes. Part V. The chemistry of 2,4,5,6-tetraphenylcyclopenta[b]pyran
- 1 January 1966
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society C: Organic
- p. 859-861
- https://doi.org/10.1039/j39660000859
Abstract
Three tetra-arylcyclopenta[b]pyrans have been prepared. Halogenation, nitration, formylation, azo-coupling, and Friedel–Crafts alkylation of 2,4,5,6-tetraphenylcyclopenta[b]pyran takes place on C-7. Protonation and condensation with aromatic aldehydes gives pyrylium salts, the structures of which are discussed.Keywords
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