1: 3-bromo-6-tert-butyl-1,2-dimethoxy-4-methylbenzene With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in tetrahydrofuran; hexane T=0°C; 0.333333 h; 2: 5-tert-butyl-3,4-dimethoxybenzaldehyde in tetrahydrofuran; hexane T=0 - 20°C;