1: 3-(methoxymethoxy)quinoline With 2,2,6,6-tetramethylpiperidinyl-lithium in tetrahydrofuran T=-78°C; 2 h; 2: carbon dioxide in tetrahydrofuran 3: With hydrogenchloride

1.1: tetrahydrofuran; diethyl ether / 1 h / 0 °C 1.2: 88 percent / ammonium cerium(IV) nitrate / H2O; acetone / 0.5 h 2.1: selenium dioxide / dioxane / 1 h / Heating 2.2: 70 percent / hydrogen peroxide; formic acid / H2O / 0 - 10 °C View Scheme