反应详情

[4-tert-butoxycarbonylamino-2′-(2-hydroxy-ethanesulfonyl)-biphenyl-3-yl]-carbamic acid tert-butyl ester (0.233 g, 0.476 mmol) in a solution of 4M HCl in dioxane (6 mL) was stirred at room temperature for 2 hours. The reaction mixture was concentrated under reduced pressure. The residue was dissolved in EtOAc, and the solution was washed with saturated sodium bicarbonate and water (pH=7). The organic layer was dried over Na2SO4, filtered, and the filtrate was concentrated in vacuo to provide the title compound as a yellow oil (0.136 g, 98%).

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. dissolutionThe residue was dissolved in EtOAc
3. washthe solution was washed with saturated sodium bicarbonate and water (pH=7)
4. dry with materialThe organic layer was dried over Na2SO4
5. filtrationfiltered
6. concentrationthe filtrate was concentrated in vacuo