Lewis acid promoted synthesis of methylene-bridged α-and γ-bis-benzopyrones
By: Sandeep Kumar
.
Contributor(s): Prasad, Ashok K.
Publisher: New Delhi CSIR 2022Edition: Vol.61, Jan.Description: 43-50p.Subject(s): GENERAL CHEMISTRYOnline resources: Click here
In:
Indian journal of chemistry (Section B)Summary: 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.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
|---|---|---|---|---|---|---|
Articles Abstract Database
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School of Pharmacy Archieval Section | Not for loan | 2023-0674 |
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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.
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