反应详情

In a manner analogous to the method described in example 5, rac-(4S*,5R*)-2-(4-tert-butyl-5-chloro-2-ethoxy-phenyl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-1H-imidazole was reacted with 1-(3-methanesulfonyl-propyl)-piperazine dihydrochloride (prepared as described in Fotouhi, N. et al. WO 2005110996) to give the racemic rac-(4S*,5R*)-2-(4-tert-butyl-5-chloro-2-ethoxy-phenyl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazol-1-yl]-[4-(3-methanesulfonyl-propyl)-piperazin-1-yl]-methanone. Chiral separation of the enantiomers by supercritical fluid chromatography (Berger Instrument Multi-Gram II, Daicel ChiralPak OD-H 3×25 cm, 35° C. at 100 bar, eluting with 25% methanol in carbon dioxide) gave the title compound. HR-MS (ES, m/z) calculated for C38H48N4O4SCl3 [(M+H)+] 761.2457, observed 761.2460.