反应详情

温度

55 °C

A solution of tert-butyl 4-[4-(4-methoxycarbonylphenoxymethyl)thiazol-2-yl]piperazine-1-carboxylate (820 mg, 1.89 mmol) in methanol (30 mL) and THF (10 mL) was treated with a solution of sodium hydroxide (226 mg, 5.67 mmol) in water (10 mL). The mixture was stirred at 55° C. for 8 hours and then concentrated by evaporation. The aqueous solution was diluted with water (10 mL) and the dilution was acidified with dilute hydrochloric acid. A resulting solid was collected by filtration to provide 4-[2-(4-tert-butoxycarbonylpiperazin-1-yl)thiazol-4-ylmethoxy]benzoic acid (800 mg, 100% yield). HNMR (dmso-d6): 7.88 (2H, d), 7.09 (2H, d), 6.91 (1H, s), 4.99 (2H, s) 3.44 (8H, m), 1.41 (9H, s).

1. concentrationconcentrated by evaporation
2. additionThe aqueous solution was diluted with water (10 mL)
3. filtrationA resulting solid was collected by filtration