1: (E)-3-(methoxycarbonyl)-4-(3-aminophenyl)but-3-enoic acid With sodium acetate in acetic anhydride Friedel-Crafts reaction; 0.0833333 h; microwave irradiation; 2: With sulfuric acid in ethanol 24 h; Heating; 3: 1,1'-carbonyldiimidazole With triethylamine in tetrahydrofuran T=0°C; 3 h; Further stages.;

1: With sodium acetate in acetic anhydride Friedel-Crafts reaction; 0.0833333 h; microwave irradiation; 2: With sulfuric acid in ethanol 24 h; Heating; Further stages.;

1: (E)-3-(methoxycarbonyl)-4-(3-aminophenyl)but-3-enoic acid With sodium acetate; acetic anhydride Friedel-Crafts type acylation; 0.0833333 h; Microwave irradiationInert atmosphere; 2: With hydrogenchloride; water 5 h; 3: ethanol regioselective reactionFurther stages;

1: (E)-3-(methoxycarbonyl)-4-(3-aminophenyl)but-3-enoic acid With sodium acetate; acetic anhydride Friedel-Crafts type acylation; 0.0833333 h; Microwave irradiationInert atmosphere; 2: With hydrogenchloride; water 5 h; 3: ethanol With sulfuric acid 24 h; RefluxInert atmosphere;