1: 1-bromo-3,4-dimethylbenzene With n-butyllithium in tetrahydrofuran; hexane T=-70 - 0°C; 2: N,N-dimethyl-formamide in tetrahydrofuran; hexane T=0°C; 1 h; 3: With ammonia; iodine in tetrahydrofuran; hexane; water T=0 - 20°C;
1: With magnesium in tetrahydrofuran T=20°C; 2 h; 2: With N,N-dimethyl-formamide in tetrahydrofuran T=0°C; 2 h; 3: With ammonia; iodine in tetrahydrofuran; water T=20°C; 2 h;
