Water → HCID 70231137, compound

Participants

Reaction Steps

1-[2-[[2-(4-Fluoro-2-methylphenyl)-2-(2-methyl-phenyl)ethenyl]oxy]ethyl]-1,2,5,6-tetrahydro-3-pyridine carboxylic acid methyl ester (0.74 g, 0.0018 mol) (prepared as described in Method C) was dissolved in ethanol (15 ml) and 10N sodium hydroxide solution (1.8 ml) was introduced. After stirring the reaction mixture for 2 h at room temperature TLC indicated that saponification was incomplete, so further 10 N sodium hydroxide solution (1.8 ml) was added, and the reaction mixture was heated for 10 min. at 40° C. Water (400 ml) was added, and the solution was extracted with diethyl ether (100 ml). The aqueous layer was acidified to pH 5 with 2N hydrochloric acid solution and extracted with dichloromethane (4×50 ml). The combined extracts were dried (MgSO4) and evaporated to a residue (0.61 g) which was dissolved in toluene (50 ml). Methanol (0.2 ml) and chlorotrimethylsilane (0.216 ml) were added, and after mixing, a layer of cyclohexane (ca. 30 ml) was added. After storing this mixture at 4° for 18 h, the title compound was collected by filtration (0.60 g, 77%), m.p. 190°-201° (after drying in vacuo).

Provenance & Evidence