1: 1-methoxy-3-phenoxybenzene With n-butyllithium in tetrahydrofuran T=-78 - 20°C; 2 h; 2: 1-methoxy-9H-xanthen-9-one in tetrahydrofuran T=-78°C; Further stages.;

hydrogenchloride; acetic acid in water 6 h; Heating / reflux;