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温度

0 °C

(4-{2-[2-(Methoxycarbonyl)phenoxy]ethyl}phenoxy)acetic acid (0.150 g, 0.454 mmol) was dissolved in DMF (10 ml), N-(2,4-difluorobenzyl)-N-propylamine (0.084 g, 0.454 mmol) was added and the mixture was cooled to 0° C. N-[(1H-1,2,3-benzotriazol-1-yloxy)(dimethylamino)methylene]-N-methylmethanaminium tetrafluoroborate (0.160 g, 0.499 mmol) and N-ethyl-N,N-diisopropylamine (0.123 g, 0.954 mmol) was added. The solution was stirred for two hours at room temperature. EtOAc (20 ml) was added and the organic phase was washed with Na2CO3 (3×20 ml, aq) and HCl (0.5 M, 2×10 ml). The organic layer was dried (MgSO4) and the solvent was removed by evaporation to give 0.220 g of methyl 2-[2-(4-{2-[(2,4-difluorobenzyl)(propyl)amino]-2-oxoethoxy}phenyl)-ethoxy]benzoate (yield 97.4%).

1. washthe organic phase was washed with Na2CO3 (3×20 ml, aq) and HCl (0.5 M, 2×10 ml)
2. dry with materialThe organic layer was dried (MgSO4)
3. customthe solvent was removed by evaporation