反应详情

To a solution of trans-4-[(3-{[2-chloro-5-methoxy-4-(2-oxoethyl)phenyl]amino}-3-oxopropyl)(methyl)amino]cyclohexyl hydroxy(di-2-thienyl)acetate (intermediate 123; 173 mg, 0.16 mmol) in methanol (1.73 mL) was added (2R)-2-{[tert-butyl(dimethyl)silyl]oxy}-2-(8-hydroxy-2-oxo-1,2-dihydroquinolin-5-yl)ethanaminium acetate (prepared according to preparation 8 from US20060035931) (78 mg, 0.2 mmol), diisopropylethylendiamine (0.03 mL, 0.2 mmol) and sodium triacetoxyborohydride (108 mg, 0.51 mmol). The reaction mixture was stirred for 2.5 hours at room temperature. At 0° C. the mixture was added into a 20 mL of bicarbonate 4%, then the crude was extracted with ethyl acetate, washed with water and brine, dried and the solvent was removed under reduced pressure. The crude obtained was purified by column chromatography with silica gel, eluting with methylen chloride/methanol (9:1) to give the title compound as a yellow solid (52%).

1. extractionthe crude was extracted with ethyl acetate
2. washwashed with water and brine
3. customdried
4. customthe solvent was removed under reduced pressure
5. customThe crude obtained
6. customwas purified by column chromatography with silica gel
7. washeluting with methylen chloride/methanol (9:1)