1: 3-(methoxymethoxy)-2-cyclohexenone With lithium diisopropyl amide in tetrahydrofuran T=-78°C; Metallation; 0.5 h; 2: methyl iodide in tetrahydrofuran T=-78 - 20°C; Methylation; 1 h;

1: 88 percent / i-Pr2NEt / CH2Cl2 / 24 °C 2: 1) LDA / 2) THF, -42 to 0 degC View Scheme