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- W2040454620 abstract "Abstract The oxidative rearrangement of ( E , E )‐4‐alkyl‐2′‐hydroxy‐2‐cinnamylideneacetophenones 4 , obtained by base‐catalysed aldol reaction of 2′‐hydroxyacetophenone and cinnamaldehydes with thallium(III) trinitrate, gave the corresponding 3‐alkyl‐4‐aryl‐1‐(2′‐hydroxyphenyl)‐2‐(dimethoxymethyl)‐3‐buten‐1‐ones. The cyclization of these acetal intermediates with hydrochloric acid gave ( E )‐3‐styrylchromones 5 . The stereochemistry of the 4‐alkyl‐2′‐hydroxy‐2‐cinnamylidene‐acetophenones 4 and 3‐styrylchromones 5 double bonds was established by NOE experiments." @default.
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- W2040454620 date "1997-10-01" @default.
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- W2040454620 title "Oxidation of 4-Alkyl-2′-Hydroxy-2-cinnamylideneacetophenones with Thallium(III) Trinitrate: A New Synthesis of (E)-3-Styrylchromones" @default.
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