1: 1.) magnesium / 1.) THF, reflux, 2 h, 2.) reflux, 16 h 2: 25 percent / zinc, formic acid / 16 h / Heating 3: 2.) NaBH4 / 1.) acetone, RT, 16 h, 2.) MeOH, RT, 16 h View Scheme

1: 25 percent / zinc, formic acid / 16 h / Heating 2: 2.) NaBH4 / 1.) acetone, RT, 16 h, 2.) MeOH, RT, 16 h View Scheme

sodium tetrahydroborate 1.) acetone, RT, 16 h, 2.) MeOH, RT, 16 h; Yield given. Multistep reaction;