404. Chalkones. Synthesis of 1-p-alkoxyarylidene-5: 6-benzocoumaran-2-ones

AP Khanolkar, TS Wheeler

文献索引：Khanolkar; Wheeler Journal of the Chemical Society, 1938 , p. 2118

全文：HTML全文

被引用次数: 0

摘要

4-Bromo-1-hydroxy-2-naphthyl aa-dibromo-P-3: 4-methylenedioxyphenylethyJ ketone, obtained by treating at 0" a suspension of 1-hydroxy-2-naphthyl 3: 4-methylenedioxystyryl ketone (6.2 g.)(Kostanecki, loc. cit.) in carbon disulphide (150 cc) with a solution of bromine (6.2 g.) in carbon disulphide (100 cc) and evaporating the solvent after 12 hours, had mp 173" after crystallisation from chloroform-light petroleum (Found: Br, 43-5. C,, H,, O, Br, ...