SYNTHESES OF CHROMANES AND COUMARANES.
β Scribed by Rindfusz, R. E.
- Book ID
- 120441780
- Publisher
- American Chemical Society
- Year
- 1919
- Tongue
- English
- Weight
- 521 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0002-7863
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## Abstract magnified image This review intends to explore synthetic methodologies for the preparation of 2__Hβ__chromenes and their analog chromanes through __ortho__βquinone methide (__o__βQM) intermediates associated with inter and intramolecular heteroβDielsβAlder and electrocyclization reactio
Monunorillonite clays catalyze the rearrangement of substituted ally1 phenyl ethers to provide onho-ally1 phenols, chromans and coumaran s under mild conditions. The [3,33 sigmatropic shift (Claisen rearrangement) of ally1 aryl ethers provides convenient access to ortho-ally1 phenols, precursors to