Multi-step reaction with 13 steps
1: 94 percent / Ti(O-i-Pr)4; L-(+)-diisopropyl tartrate; TBHP / -20 °C / pH 8
2: 94 percent / Dess-Martin periodinane / CH2Cl2 / 20 °C
3: 80 percent / n-BuLi / tetrahydrofuran / -78 - 20 °C
4: 98 percent / aq. NH4Cl / methanol; tetrahydrofuran / 80 °C
5: 99 percent / imidazole / dimethylformamide / 20 °C
6: 94 percent / DIBALH / CH2Cl2 / -40 °C
7: 82 percent / tetrahydrofuran / 1 h / -20 °C
8: 99 percent / Grubbs' 2nd generation Ru catalyst / CH2Cl2 / 0.75 h / 20 °C
9: 99 percent / MnO2 / CH2Cl2 / 11.5 h / 20 °C
10: 68 percent / LDA / hexamethylphosphoric acid triamide; tetrahydrofuran / -78 - -42 °C
11: 62 percent / Dowex 50W-X8; 4 Angstroem molecular sieves / methanol; tetrahydrofuran / 5 h / 20 °C
12: 50 percent / DIBALH; ZnBr2 / tetrahydrofuran; hexane / 2 h / -50 °C
13: 72 percent / PPh3; DEAD / toluene / 6 h / 20 °C
With
1H-imidazole; titanium(IV) isopropylate; tert.-butylhydroperoxide; manganese(IV) oxide; n-butyllithium; L-(+)-diisopropyl tartrate; 4 A molecular sieve; Dowex 50W-X8; diisobutylaluminium hydride; ammonium chloride; Dess-Martin periodane; triphenylphosphine; zinc dibromide; lithium diisopropyl amide; diethylazodicarboxylate;
tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride;
In
tetrahydrofuran; methanol; N,N,N,N,N,N-hexamethylphosphoric triamide; hexane; dichloromethane; N,N-dimethyl-formamide; toluene;
1: Sharpless asymmetric epoxidation / 3: Wittig methylenation / 13: Mitsunobu reaction;
DOI:10.1055/s-2005-863742