Multi-step reaction with 11 steps
1: 87 percent / pyridine / 15 h / Ambient temperature
2: 1.) NaBH4, 2.) PCC / 1.) EtOH, 25 deg C, 1 h, 2.) CH2Cl2, r.t., 4 h
3: 1.) BF3*Et2O, 2.) NaBH4 / 1.) ether, 0 deg C, 2 h, 2.) MeOH, -50 deg C, 40 min
4: 70 percent / CrO3, Celite / CH2Cl2; pyridine / 0.33 h / 0 °C
5: 1.) NaH / 1.) THF, -25 deg C, 30 min, 0 deg C, 15 min, 2.) THF, 0 deg C, 20 min
6: 59 percent / 35percent H2O2 / CH2Cl2 / 0.5 h / 0 - 30 °C
7: diisipropylethylamine / dimethylformamide / 3 h / Ambient temperature
8: NaCl, H2O / dimethylsulfoxide / 2 h / 150 °C
9: 56 percent / methanol / 1.) -78 deg C, 1 h, 2.) r.t., 1 h
10: 24 percent / Zn(BH4)2 / 1,2-dimethoxy-ethane / 2.5 h / 0 °C
11: 68 percent / Et3N / CH2Cl2 / 0.17 h / -25 °C
With
chromium(VI) oxide; sodium tetrahydroborate; zinc(II) tetrahydroborate; Celite; boron trifluoride diethyl etherate; water; dihydrogen peroxide; sodium hydride; triethylamine; N-ethyl-N,N-diisopropylamine; pyridinium chlorochromate; sodium chloride;
In
pyridine; methanol; 1,2-dimethoxyethane; dichloromethane; dimethyl sulfoxide; N,N-dimethyl-formamide;
DOI:10.1016/S0040-4020(01)88650-6