反应详情

To a stirred solution of 5-benzyloxy-2-[1-(4-chlorophenyl)-cyclopentylmethyl]-6-hydroxypyrimidine-4-carboxylic acid [2-(tert-butyl-dimethylsilanyloxy)-ethyl]-cyclopropylmethyl-amide (329) (580 mg, crude) in tetrahydrofuran (30 mL) was added 1N aq.HCl (6 mL) at room temperature and stirring was continued for 1 h (TLC; 100% ethyl acetate/UV/SiO2, Rf=0.2). Tetrahydrofuran was removed in vacuo and the crude mass was dissolved in ethyl acetate (50 mL) and washed with NaHCO3 solution (10 mL), water (20 mL) and brine (20 mL); The organic phase was dried and concentrated in vacuo to get a crude mass which was purified by CombiFlash using a gradient eluent mixture of ethyl acetate and hexane to get pure 5-benzyloxy-2-[1-(4-chlorophenyl)-cyclopentylmethyl]-6-hydroxypyrimidine-4-carboxylic acid cyclopropylmethyl-(2-hydroxyethyl)-amide (330) (390 mg, 94% two steps) as an off-white sticky solid.

1. customTetrahydrofuran was removed in vacuo
2. dissolutionthe crude mass was dissolved in ethyl acetate (50 mL)
3. washwashed with NaHCO3 solution (10 mL), water (20 mL) and brine (20 mL)
4. customThe organic phase was dried
5. concentrationconcentrated in vacuo
6. customto get a crude mass which
7. customwas purified by CombiFlash
8. additiona gradient eluent mixture of ethyl acetate and hexane