1: 1.) n-BuLi, 2.) (i-PrO)3B, 3.) Pd2(dba)3, PPh3, aq. Na2CO3 2: aq. NaOH View Scheme

1: Methyl 2-(4'-bromophenyl)propanoate With n-butyllithium; diisopropylamine in tetrahydrofuran T=-78 - 0°C; 0.75 h; 2: methyl iodide in tetrahydrofuran T=-78 - 20°C; 1.5 h; 3: With potassium tert-butylate in tetrahydrofuran T=0 - 20°C; 1.5 h;