Multi-step reaction with 11 steps
1.1: MeONa / methanol / 2 h
2.1: p-TsOH / acetonitrile / Heating
3.1: 91 percent / SO2Cl2 / CH2Cl2; pyridine / 2 h / -78 - 20 °C
4.1: Et4NBr / CH2Cl2 / 1 h / 20 °C
4.2: 96 percent / KHCO3; KI / methanol; H2O / 0.25 h
5.1: 91 percent / imidazole / dimethylformamide / 3 h / 60 °C
6.1: 87 percent / KHCO3; H2 / 10percent Pd/carbon / ethyl acetate; ethanol / 96 h / 760.05 Torr
7.1: 93 percent / NBS; BaCO3 / CCl4 / 0.5 h / Heating
8.1: 93 percent / KHCO3; H2 / 10percent Pd/carbon / ethanol / 48 h / 760.05 Torr
9.1: 88 percent / NaH / dimethylformamide / 5 h / 20 °C
10.1: 92 percent / Bu4NF / tetrahydrofuran / 1 h / 20 °C
11.1: 91 percent / DMAP / pyridine / 20 °C
With
1H-imidazole; dmap; N-Bromosuccinimide; sulfuryl dichloride; tetraethylammonium bromide; tetrabutyl ammonium fluoride; hydrogen; sodium methylate; sodium hydride; potassium hydrogencarbonate; toluene-4-sulfonic acid; barium carbonate;
10percent Pd/carbon;
In
tetrahydrofuran; pyridine; methanol; tetrachloromethane; ethanol; dichloromethane; ethyl acetate; N,N-dimethyl-formamide; acetonitrile;
1.1: Deacetylation / 2.1: Condensation / 3.1: Substitution / 4.1: Substitution / 4.2: Hydrolysis / 5.1: silylation / 6.1: Dehalogenation / 7.1: Ring cleavage / 8.1: Reduction / 9.1: Alkylation / 10.1: desilylation / 11.1: Acylation;
DOI:10.1021/jo991812k