反应详情

To a suspension of (R)-5-(2-amino-1-hydroxyethyl)-8-hydroxyquinolin-2(1H)-one hydrochloride (0.136 g, 0.53 mmol) in methanol (3.5 mL) was added triethylamine (0.148 mL, 1.06 mmol). The mixture was stirred for 10 minutes and then a solution of 4-oxobutyl 1-(4-((3-((S)-phenyl((((R)-quinuclidin-3-yloxy)carbonyl)amino)methyl)-phenoxy)methyl)benzoyl)piperidine-4-carboxylate (0.337 g, 0.50 mmol) in methanol (3.4 mL) was added. The mixture was stirred at RT for 1 hour. Sodium triacetoxyborohydride (0.267 g, 1.26 mmol) followed by acetic acid (0.121 mL, 2.12 mmol) was added and the reaction continued for a further 18 hours. The reaction mixture was quenched with water and evaporated at reduced pressure. The residue dissolved in iso-butanol and washed with water. The organic phase was evaporated at reduced pressure and the crude material was purified by reverse phase preparative HPLC to afford the title compound (0.072 g, 16%).

1. stirringThe mixture was stirred at RT for 1 hour
2. additionwas added
3. waitthe reaction continued for a further 18 hours
4. customThe reaction mixture was quenched with water
5. customevaporated at reduced pressure
6. dissolutionThe residue dissolved in iso-butanol
7. washwashed with water
8. customThe organic phase was evaporated at reduced pressure
9. customthe crude material was purified by reverse phase preparative HPLC