反应详情

To a solution of crude intermediate 17, 3-(3-chloro-4-((pyrrolidin-1-yl)methyl)phenyl)-3-hydroxycyclobutanecarboxylic acid (˜4.3 mL ˜0.65 mmol) was added methyl-(3-methyl-pyridin-2-ylmethyl)-amine (176 mg, 1.29 mmol) and T3P (50% solution in EtOAc, 0.62 ml, 0.97 mmol). The resulting reaction mixture was stirred at RT for 1 hr and then 25 ml of 1N NaOH and 100 ml of EtOAc were added and the layers were separated. The aqueous layer was subjected to EtOAc extraction (2×60 ml) again and the combined organic layers were dried over MgSO4 and evaporated. The residue was purified by flash column chromatography using a 40 g ISCO™ column, eluting with 5% MeOH/CH2Cl2 containing 0.25% NH4OH. The product containing fractions were collected and concentrated under reduced pressure to give the title compound 127 mg, 46% yield). Rf=0.30 (15% MeOH/CH2Cl2+0.2% NH4OH); LRMS m/z Calcd for C24H30ClN3O2, 427.9, found, 428.2 (M+1) APCI; 400 MHz 1H NMR (CDCl3) 2:1 mixture of rotomers, diagnostic peaks, δ 4.72, 4.53 (s, 2H), 3.72 & 3.70 (s, 2H), 2.97, 2.93 (s, 3H), 1.76-1.74 (m, 4H); 100 MHz 13C NMR (CDCl3) 2:1 mixture of rotomers, diagnostic peaks δ 177.6, 175.7, 154.7, 153.6, 146.8, 146.6, 126.5, 126.4, 122.8, 122.7, 73.4, 73.2, 56.7, 56.6, 54.3, 54.2, 51.1, 41.4, 40.9, 35.6, 35.4, 28.9, 28.7, 23.7, 23.6, 18.3, 18.2.

1. customThe resulting reaction mixture
2. customthe layers were separated
3. extractionThe aqueous layer was subjected to EtOAc extraction (2×60 ml) again
4. dry with materialthe combined organic layers were dried over MgSO4
5. customevaporated
6. customThe residue was purified by flash column chromatography
7. washeluting with 5% MeOH/CH2Cl2 containing 0.25% NH4OH
8. additionThe product containing fractions
9. customwere collected
10. concentrationconcentrated under reduced pressure