1: 1.) NaH, 2.) NaOH 2: 75 percent / Na(Hg), disodium hydrogen phosphate / methanol; tetrahydrofuran 3: 1.) BH3*THF, 2.) HCl / 1.) reflux, 1 h, 2.) MeOH, reflux, 1 h 4: 53 percent / H2 / 10percent Pd/C / methanol / 2250.2 Torr View Scheme

1: 1.) NaH, 2.) NaOH 2: 73 percent / Na(Hg), disodium hydrogen phosphate / methanol; tetrahydrofuran 3: 1.) BH3*THF, 2.) HCl / 1.) reflux, 1 h, 2.) MeOH, reflux, 1 h 4: 54 percent / H2 / 10percent Pd/C / methanol / 2250.2 Torr View Scheme

1: 1.) NaH, 2.) NaOH 2: 75 percent / Na(Hg), disodium hydrogen phosphate / methanol; tetrahydrofuran 3: 1.) BH3*THF, 2.) HCl / 1.) reflux, 1 h, 2.) MeOH, reflux, 1 h View Scheme