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- W2072500931 abstract "Chloromethylation of 3-furoates, followed by a Friedel–Crafts reaction, gives 5-aralkyl-3-furoates. Such compounds and the corresponding 3-thenoates are more conveniently synthesised by condensing the ethylene acetals of 5-substituted levulinic esters with ethyl formate. The resulting 2-formyl-4-oxo-ester derivatives are cyclised directly by aqueous acids to give furans, and by phosphorus pentasulphide to give the corresponding thiophens." @default.
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- W2072500931 date "1971-01-01" @default.
- W2072500931 modified "2023-10-06" @default.
- W2072500931 title "The pyrethrins and related compounds. Part XII. 5-Substituted 3-furoates and 3-thenoates, intermediates for synthesis of insecticidal esters" @default.
- W2072500931 doi "https://doi.org/10.1039/j39710002551" @default.
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