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- W1480778380 abstract "The reaction of 2'-hydroxychalcone dibromides 1 or α-bromo-2'-hydroxychalcones 15 with sodium azide resulted in a mixture of α-azido-2'-hydroxychalcones 2, 3-aryl-5-(2-hydroxy-pheny)isoxazoles 3, flavones 4, aurones 5 and 4-aryl-5-(2-hydroxybenzoyl)-1,2,3-triazoles 6. The product ratio was strongly influenced by the character of the substituent at position C-4. Similar results were obtained with 2'-benzyloxy-4-nitrochalcone dibromide (10) and 2'-benzyloxy-α-bromo-4-mtrochalcone (17). The mechanism of the transformation of chalcone dibromides into the products via an α-bromochalcone intermediate is discussed." @default.
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- W1480778380 date "1984-01-01" @default.
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- W1480778380 title "Flavonoids—38" @default.
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- W1480778380 doi "https://doi.org/10.1016/s0040-4020(01)83509-2" @default.
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