反应详情

A solution of [1-{4-[2-[3-methoxy-4-[3-o-tolyl-ureido]-phenyl]-acetylamino]-phenyl}-cyclopentyl]-acetic acid tert-butyl ester (0.29 g, Reference Example 8) in a mixture of trifluoroacetic acid (7.5 mL), dichloromethane (1.5 mL) and water (1 mL) was stirred at room temperature for 1.5 hours and then evaporated. The residue was chased with toluene to yield a green glass, which was subjected to preparative HPLC [HyperPrep HS C-18 silica column using methanol with 0.05% trifluoroacetic acid and water with 0.05% trifluoroacetic acid as the mobile phase] to give the title compound (0.05 g) as a white solid, m.p. 223–226° C. LC-MS: RT=3.51 minutes, MS(ES+): 538(M+Na+), 516(M+H)+, 554(M+K)+; MS(ES−): 514(M−H)−.

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