1: With 4-methyl-morpholine; isobutyl chloroformate in tetrahydrofuran T=-78 - 0°C; 0.833333 h; Inert atmosphere; 2: With methanol; sodium tetrahydroborate in tetrahydrofuran T=-78°C; 2 h;

sodium sulfate in tetrahydrofuran; water

sodium hydrogencarbonate in 1,4-dioxane; water T=20°C;

sodium tetrahydroborate in tetrahydrofuran; water cooling;