Multi-step reaction with 17 steps
1: 59 percent / zinc borohydride / diethyl ether / 0.33 h / 0 °C
2: triethylamine / CH2Cl2 / 1 h / 0 °C
3: 1,8-diazabicyclo<5.4.0>undec-7-ene (DBU) / toluene / Ambient temperature
4: m-chloroperbenzoic acid, NaHCO3 / CH2Cl2 / 0.5 h / 0 °C
5: 78 percent / diisobutylaluminum hydride / toluene / 0.17 h / -78 °C
6: imidazole / dimethylformamide / 4.3 h / Ambient temperature
7: 1.) trimethylaluminum, 3.) NaF
8: triethylamine / CH2Cl2 / 1 h / 0 °C
9: 1.) oxalyl chloride, dimethylsulfoxide, 2.) Et3N / 1.) CH2Cl2, -78 deg C, 15 min, 2.) CH2Cl2, -78 deg C, 10 min
10: 1.) n-BuLi / 1.) hexane, THF, -78 deg C, 40 min, 2.) hexane, THF, -78 deg C, 30 min
11: 1.) n-BuLi / 1.) hexane, THF, from -78 deg C to RT, 15 min, 2.) hexane, THF, from -78 deg C to RT, 64 h
12: 96 percent / KOH / methanol; H2O / 18 h / Heating
13: 97 percent / tetrahydrofuran / 8 h / Ambient temperature
14: 98 percent / triethylamine, 4-(dimethylamino)pyridine / dimethylformamide / 2.5 h / Ambient temperature
15: 10-camphorsulfonic acid, sodium sulfate / toluene / 0.67 h / Heating
16: LiAlH4 / tetrahydrofuran / 2.5 h / 0 °C
17: 73 percent / 1,2,2,6,6-pentamethylpiperidine (PMP) / CH2Cl2 / 3.5 h / 0 °C
With
1,2,2,6,6-pentamethylpiperidine; 1H-imidazole; dmap; potassium hydroxide; lithium aluminium tetrahydride; n-butyllithium; oxalyl dichloride; zinc borohydride; (1S)-10-camphorsulfonic acid; trimethylaluminum; diisobutylaluminium hydride; sodium hydrogencarbonate; sodium fluoride; dimethyl sulfoxide; 1,8-diazabicyclo[5.4.0]undec-7-ene; sodium sulfate; triethylamine; 3-chloro-benzenecarboperoxoic acid;
In
tetrahydrofuran; methanol; diethyl ether; dichloromethane; water; N,N-dimethyl-formamide; toluene;
DOI:10.1021/jo00221a012