Multi-step reaction with 12 steps
1.1: 64.42 g / pyridine / CH2Cl2 / 24.5 h / 0 - 20 °C
2.1: 93 percent / LiBr / tetrahydrofuran / 47 h / Heating
3.1: 76 percent / Li2CuCl4 / tetrahydrofuran; diethyl ether / 17 h / 20 °C
4.1: BH3*THF / tetrahydrofuran / 1 h / 0 - 20 °C
4.2: 68 percent / Br2; NaOMe / tetrahydrofuran; methanol / 5 - 20 °C
5.1: 75 percent / toluene / 48 h / Heating
6.1: PhLi / tetrahydrofuran; diethyl ether / 0.33 h / 20 °C
6.2: 54 percent / tetrahydrofuran; diethyl ether / 0.67 h / -40 - -30 °C
7.1: 80 percent / aq. AcOH / tetrahydrofuran / 47 h / Heating
8.1: 34 percent / Co(PPh3)4 / tetrahydrofuran / 0.17 h / 0 °C
9.1: 75 percent / K2CO3 / 0.5 h / 0 °C
10.1: 95 percent / molecular sieves 4 Angstroem; proton sponge / CH2Cl2 / 3 h / 20 °C
11.1: DIBAL / CH2Cl2 / 0.08 h / -78 °C
11.2: 85 percent / molecular sieves 4 Angstroem; PDC / CH2Cl2 / 1 h / 20 °C
12.1: NaH / tetrahydrofuran / 2 h / 20 °C
12.2: tetrahydrofuran / 20 h / -78 - 20 °C
With
pyridine; borane-THF; dilithium tetrachlorocuprate; Proton Sponge; tristriphenylphosphine cobalt chloride; 4 A molecular sieve; sodium hydride; diisobutylaluminium hydride; potassium carbonate; acetic acid; phenyllithium; lithium bromide;
In
tetrahydrofuran; diethyl ether; dichloromethane; toluene;
6.2: Wittig-Schlosser reaction / 8.1: Reformatsky reaction / 12.2: Wittig reaction;
DOI:10.1021/np000502q