1: 61 percent / H2SO4; CrO3 / H2O; acetone / 2.5 h 2: 88 percent / DCC; DMAP / CH2Cl2 / 18 h 3: 79 percent / sodium borohydride / methanol / 1 h 4: 42 percent / tetraethylammonium bromide; 4 Angstroem molecular sieves / CH2Cl2 / 24 h / 20 °C 5: 71 percent / H2 / Pd-C / ethanol 6: H2 / Pd-C / ethanol View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3587189', constants.ctx, '0')">hydrogen</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '11378922', constants.ctx, '0')">palladium on activated charcoal</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a> <br /> <br /> &nbsp;