hydrogen; platinum(IV) oxide in ethanol P=760 Torr; 18 h;

1: H2 / PtO2 / ethanol / 18 h / 760 Torr 2: CrO3, Py / 0.17 h 3: (i) Ph3P, toluene, (ii) NaOMe, DMF, (iii) /BRN= 1920910/ 4: LiAlH4 / diethyl ether / 20 h View Scheme

1: H2 / PtO2 / ethanol / 18 h / 760 Torr 2: CrO3, Py / 0.17 h View Scheme