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-(tetrahydro-pyran-4-ylmethyl)-amine hydrochloride (200 mg, 1.21 mmol), triethylamine (0.108 ml, 0.78 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 (87 mg, 32% yield). Rf=0.80 (20% MeOH/CH2Cl2+0.2% NH4OH); LRMS m/z Calcd for C23H33Cl N2 O, 420.9, found, 421.3 (M+1) APCI; 400 MHz 1H NMR (CDCl3) mixture of rotomers, diagnostic peaks, δ 3.98-3.88 (m, 2H), 3.73 (s, 2H), 2.95 (s, 3H), 2.62-2.54 (m, 6H), 1.70-1.46 (m, 2H), 1.38-1.17 (m, 2H).

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