| 摘要 |
Title compds. (I; X1,X2,X3 = 3-methyl-2-buteneoxy or H; R = H or C1-6 lower alkyl) were manufd. by reaction of II and III. Thus, 1.5g 2-(ethoxycarbonylmethoxy)-4-(3-methyl-2-butenloxy)-acetophenone was reacted with 4-(3-methyl-2-butenyloxy)-benzaldehyde and 10 ml sodium hydroxide soln. to give 1.7 g 2'(carboxymethoxy)-4,4'-bis-(3-methyl-2-butenyloxy)-chalcone.
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