tetrabutyl ammonium fluoride in tetrahydrofuran 1.5 h; Ambient temperaturecleavage of acetals with tetraalkylammonium fluoride salts; protection and deprotection of alcohols with chloromethoxysilanes; Product distribution;

<b>Multi-step reaction with 3 steps<br /> </b>1: 4-(dimethylamino)pyridine, Et₃N / CH₂Cl₂ <br />2: 97 percent / SO₂Cl₂, Et₃N / hexane / 1.) 0 deg C, 30 min, 2.) room temperature, 10 min<br />3: 92 percent / (i-Pr)2NEt / CH₂Cl₂ / 20 h / Ambient temperature<br /> <br /> &nbsp;