Multi-step reaction with 7 steps
1: 1.) NaOMe, 2.) NaBH4 / 1.) MeOH, 2 h, room t., 2.) MeOH, 18 h
2: 97.7 percent / Et3N / CH2Cl2 / 0.25 h / -20 °C
3: 83.2 percent / NaN3 / hexamethylphosphoric acid triamide / 2 h / 50 °C
4: LiAlH4 / diethyl ether / 0 deg C, then reflux, 2 h
5: Et3N / CH2Cl2 / 1 h / Ambient temperature
6: 89.3 percent / MeOH / p-TsOH / 2 h / Ambient temperature
7: 1.) DMSO, (COCl)2 3.) Et3N / 1.) CH2Cl2, -50 deg C, 2 min, 2.) DMSO, CH2Cl2, -50 deg C, then -15 deg C, 20 min 3.) DMSO, CH2Cl2, -50 deg C, 5 min
With
methanol; sodium tetrahydroborate; lithium aluminium tetrahydride; sodium azide; oxalyl dichloride; sodium methylate; dimethyl sulfoxide; triethylamine;
toluene-4-sulfonic acid;
In
N,N,N,N,N,N-hexamethylphosphoric triamide; diethyl ether; dichloromethane;
DOI:10.1248/cpb.37.948