Multi-step reaction with 13 steps
1.1: TiCl4; iPr2NEt / CH2Cl2 / 6 h / 0 °C
1.2: 68 percent / LiBH4 / H2O; tetrahydrofuran / 1 h / 0 °C
2.1: 96 percent / imidazole; I2; PPh3 / CH2Cl2 / 2 h / 0 °C
3.1: n-BuLi; LiCl; iPr2NH / hexane; tetrahydrofuran / 1.33 h / -78 - 23 °C
3.2: 97 percent / hexane; tetrahydrofuran / 18.5 h / 0 °C
4.1: 90 percent / n-BuLi; iPr2NH; LiH2N*BH3 / hexane; tetrahydrofuran / 3 h / -78 - 23 °C
5.1: 95 percent / imidazole; I2; PPh3 / CH2Cl2 / 2 h / 0 °C
6.1: n-BuLi; LiCl; iPr2NH / hexane; tetrahydrofuran / 1.33 h / -78 - 23 °C
6.2: hexane; tetrahydrofuran / 18.5 h / 0 °C
7.1: 95 percent / n-BuLi; iPr2NH; LiH2N*BH3 / hexane; tetrahydrofuran / 3 h / -78 - 0 °C
8.1: 97 percent / imidazole; I2; PPh3 / CH2Cl2 / 2 h / 0 °C
9.1: 89 percent / LDA; LiCl / tetrahydrofuran / 18 h / 0 °C
10.1: 84 percent / nBu4NOH / 2-methyl-propan-2-ol; H2O / 24 h / Heating
11.1: 95 percent / DCC; DMAP / CH2Cl2 / 2 h / 25 °C
12.1: 90 percent / n-BuLi / tetrahydrofuran / 1 h / -78 °C
13.1: 96 percent / NaBH4 / methanol / 1 h
With
1H-imidazole; dmap; sodium tetrahydroborate; n-butyllithium; lithium amidotrihydroborate; tetra(n-butyl)ammonium hydroxide; iodine; titanium tetrachloride; diisopropylamine; N-ethyl-N,N-diisopropylamine; dicyclohexyl-carbodiimide; triphenylphosphine; lithium chloride; lithium diisopropyl amide;
In
tetrahydrofuran; methanol; hexane; dichloromethane; water; tert-butyl alcohol;
DOI:10.1021/ol034243i