(E)-3-(2-Acetylamino-4-chloro-phenyl)-acrylic acid (168 mg, 0.7 mmol), EDCI (269 mg, 1.4 mmol); HOBT (190 mg, 1.4 mmol) and 230 mg (0.7 mmol) (2S,5S)-5-Benzyloxymethyl-1-(4-fluorobenzyl)-2-methyl-piperazine (prepared as outlined in example 47) were dissolved in 10 ml THF and stirred for 28 hours at room temperature. This mixture was then extracted 3 times with water and once with saturated sodium chloride solution. The title compound was purified by chromatography (SiO2, ethyl acetate/MeOH/NH3conc. 90/10/1) and was isolated as a pale solid (180 mg, 47%)
