lithium hydroxide; dihydrogen peroxide in tetrahydrofuran; water T=0°C; Hydrolysis; 1 h;

<b>Multi-step reaction with 4 steps<br /> </b>1: 40 percent / NaHMDS, pyridine / tetrahydrofuran<br />2: 96 percent / TsOH / CH₂Cl₂ <br />3: 1.) trifluoroacetic anhydride, pyridine, 2.) aq. LiOH / 1.) CH₂Cl₂, 0 deg C, 15 min, 2.) THF, from 0 deg C to RT<br />4: ethanolic PPTS<br /> <br /> &nbsp;