A series of unsymmetrical 2,4-disubstituted pyranocoumarins and 3-bromo-2-(4-bromoalkoxy)-derived pyranocoumarins were synthesized the palladium-catalyzed C-H arylation of 4-phenyl-4,5-pyrano[3,2-]chromen-5-ones with aryl iodide and the three-component reaction of 4-phenyl-4,5-pyrano[3,2-]chromen-5-one with bromine and cyclic ether, respectively.
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| http://dx.doi.org/10.1039/d4ob01353k | DOI Listing |
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