反应详情

2-Aminomethyl-3′-hydroxybiphenyl hydrochloride from Step H (129 mg, 0.548 mmol) and 1-(4-cyano-3-fluorobenzyl)-5-imidazolecarboxaldehyde from Example 3, Step G (132 mg, 0.576 mmol) were stirred in MeOH (2 mL) for 30 min, then NaCNBH3 (38 mg, 0.60 mmol) was added. The reaction mixture was adjusted to pH 5 with AcOH, as judged from wetted pH paper, and stirring was continued at ambient temperature for 3 days. The reaction was quenched with 10% aq. citric acid and stirred for 20 min. Sat. aq. NaHCO3 (10 mL) was added and the mixture was extracted with CH2Cl2 (4×20 mL). The combined organic extracts were dried over Na2SO4, filtered, and concentrated under reduced pressure. The titled product was crystallized from CH2Cl2-hexane and the first crop of white needles used for the next reaction.

1. customThe reaction was quenched with 10% aq. citric acid
2. stirringstirred for 20 min
3. additionSat. aq. NaHCO3 (10 mL) was added
4. extractionthe mixture was extracted with CH2Cl2 (4×20 mL)
5. dry with materialThe combined organic extracts were dried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe titled product was crystallized from CH2Cl2-hexane
9. customthe first crop of white needles used for the next reaction