Multi-step reaction with 11 steps
1.1: hexamethyldisilazane; n-BuLi / hexane; tetrahydrofuran / 0.75 h / -78 °C
1.2: 72 percent / hexane; tetrahydrofuran / 3.5 h
2.1: TFA / CH2Cl2 / 1.5 h / 0 °C
2.2: 85 percent / toluene / 0.67 h / 110 °C
3.1: 98 percent / DMAP / tetrahydrofuran / 2 h / 20 °C
4.1: 91 percent / lithium triethylborohydride / tetrahydrofuran / 1 h / -78 °C
5.1: 19 percent / tert-butyldimethylsilyl trifluoromethanesulfonate / CH2Cl2 / 0.67 h / -78 °C
6.1: 89 percent / benzylidene-bis(tricyclohexylphosphine)dichlororuthenium / CH2Cl2 / 0.5 h / 20 °C
7.1: 94 percent / H2 / Pd/C / ethanol / 30 h / 1520 Torr
8.1: 84 percent / NaHCO3 / acetonitrile; methanol / Electrolysis
9.1: 97 percent / BF3*Et2O / CH2Cl2 / -78 - -20 °C
10.1: 89 percent / CF3COOH / CH2Cl2 / 1 h / 20 °C
11.1: 99 percent / KHCO3 / ethyl acetate; H2O / 2 h
With
dmap; Grubbs catalyst first generation; n-butyllithium; boron trifluoride diethyl etherate; t-butyldimethylsiyl triflate; hydrogen; lithium triethylborohydride; sodium hydrogencarbonate; potassium hydrogencarbonate; 1,1,1,3,3,3-hexamethyl-disilazane; trifluoroacetic acid;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; ethanol; hexane; dichloromethane; water; ethyl acetate; acetonitrile;
DOI:10.1016/S0040-4020(01)00538-5