Multi-step reaction with 7 steps
1: 55 percent / 1,10-phenanthrolein, diisopropylamine, n-BuLi / tetrahydrofuran / 1.) 0 deg C, 30 min, 2.) -78 deg C, 30 min, 3.) warm to room temperature, 2 h
2: 81 percent / DIBAL / toluene / 2 h / -78 °C
3: 91 percent / BF3*OEt2 / CH2Cl2 / 2 h / Ambient temperature
4: 46 percent / acetone, Raney Ni / ethanol / 12 h / Heating
5: 62 percent / n-BuLi / diethyl ether; tetrahydrofuran / 1.) 0 deg C, 1 h, 2.) room temperature, 12 h
6: 50 percent / 105 °C
7: 1.) O2, tetraphenylporphyrin, 2.) potassium azodicarboxylate, HOAc / 1.) CH2Cl2, irradiation, -78 deg C, 5 h, 2.) CH2Cl2, -78 deg C, 30 min; room temperature, overnight
With
n-butyllithium; 1,10-Phenanthroline; boron trifluoride diethyl etherate; oxygen; potassium diazodicarboxylate; 5,15,10,20-tetraphenylporphyrin; nickel; diisobutylaluminium hydride; acetic acid; diisopropylamine; acetone;
In
tetrahydrofuran; diethyl ether; ethanol; dichloromethane; toluene;
DOI:10.1021/jo9604292