1: 98 percent / LiAlH4 / diethyl ether / Heating 2: 83 percent / 1.) pyr2*CrO3 / CH2Cl2 / 1.) 0 deg C, 15 min, 2.) from 0 deg C to room temp. 3: 1.) EtMgBr, 2.) HMPA / 1.) THF, 0 deg C, 2 h, 2.) a) 1 h, b) from 0 deg C to room temp., 1 h View Scheme

(i) LiAlH4, (ii) CrO3, Py; Multistep reaction;