Abstract
The Lewis acid promoted Fries rearrangement of O-methoxyacetyl derivatives of hydroxy-chromanones, coumarins and chromones under solvent-free condition gives isomeric methylene-bridged bischromanones, biscoumarins and bischromones, respectively, in good yields. The benzopyrone precursors undergo intermolecular rearrangement wherein two benzopyrone moieties are joined through their benzene rings via an un-substituted methylene bridge.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
