Multi-step reaction with 10 steps
1.1: sec-BuLi / tetrahydrofuran; cyclohexane / 0.42 h / -78 °C
1.2: chiral cyclopentadienyl titanium complex / tetrahydrofuran; cyclohexane; diethyl ether / 3 h / -78 °C
1.3: 69 percent / tetrahydrofuran; cyclohexane; diethyl ether / 4 h / -78 °C
2.1: 87 percent / imidazole / CH2Cl2 / 20 °C
3.1: BH3 / tetrahydrofuran / 4 h / 0 - 20 °C
3.2: aq. H2O2; NaOH / 2 h / 20 °C
3.3: 1.56 g / TBAF / tetrahydrofuran / 20 °C
4.1: 94 percent / imidazole / CH2Cl2 / 20 °C
5.1: DPPA; PPh3; DIAD / 12 h / 0 - 20 °C
6.1: 95 mg / aq. CAN / acetonitrile / 0.17 h / 0 °C
7.1: NaH / tetrahydrofuran / 0.17 h / 0 °C
7.2: 90 percent / tetrahydrofuran / 48 h / 20 °C
8.1: TBAF / tetrahydrofuran / 4 h / 20 °C
9.1: 295 mg / aq. AcOH / tetrahydrofuran / 12 h / 55 - 60 °C
10.1: DMAP; pyridine / 2 h / 0 °C
With
pyridine; 1H-imidazole; dmap; ammonium cerium(IV) nitrate; di-isopropyl azodicarboxylate; diphenyl-phosphinic acid; borane; tetrabutyl ammonium fluoride; sec.-butyllithium; sodium hydride; acetic acid; triphenylphosphine;
In
tetrahydrofuran; dichloromethane; cyclohexane; acetonitrile;
DOI:10.1055/s-2002-28505