1: 2-(4-methoxyphenyl)-acetic acid With lithium diisopropyl amide in tetrahydrofuran; cyclohexane T=-20 - 20°C; 2: ethyl-α,α,α-trifluoroacetate in tetrahydrofuran; cyclohexane T=-65°C; 0.25 h; 3: With hydrogenchloride in tetrahydrofuran; cyclohexane; water

sodium in ethanol 10 h; Heating;

pyridine in dichloromethane T=-60°C;