sodium tetrahydroborate; tetrabutyl ammonium fluoride; acetic acid 1) ca.5 deg C, 48 h 2) THF; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

sodium tetrahydroborate; tetrabutyl ammonium fluoride; acetic acid

2: 78 percent / NaOH / methanol / 6 h / Ambient temperature; pH 9 3: 70 percent / tetrabutylammonium fluoride trihydrate / tetrahydrofuran / 0.33 h / Ambient temperature View Scheme

2: 78 percent / NaOH / methanol / 6 h / Ambient temperature; pH 9 View Scheme

Yield given. Multistep reaction;