1: 4-hydroxy-6-methyl-2H-pyran-2-one With N,N,N',N',N'',N''-hexamethylphosphoric triamide; n-butyllithium in tetrahydrofuran T=-78 - -30°C; 2: ethyl iodide in tetrahydrofuran T=-78 - 20°C; 12 h; 3: methyl iodide in tetrahydrofuran T=20°C; Further stages.;

sodium carbonate in acetone Heating;

1: 2) aq. KOH / 2) Et3NCH2PhCl / 1) Et2O, -19 deg C, 2 h, 2) Et2O, r.t., 4 h 2: 95 percent / Na2CO3 / acetone / Heating View Scheme

sodium methylate in methanol T=185°C; 0.5 h;