Water → 1-[3-[5-[(2(S)-azetidinyl)methoxy]-3-pyridyl]phenyl]-3-phenyl-2(R)-propanol

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Reaction Steps

Trifluoroacetic acid (1.6 mL) and water (0.16 mL) were added to CH2Cl2 (8.0 mL). This mixture was added to 1-[3-[5-[[1-(tert-butoxycarbonyl)-2(S)-azetidinyl]methoxy]-3-pyridyl]phenyl]-3-phenyl-2(R)-propanol (381 mg, 0.80 mmol) in a 25 mL round-bottom flask with magnetic stirrer under N2. After stirring at room temperature overnight, the solution was concentrated in vacuo, the residue was diluted with water, and the solution was basified with saturated aqueous NaHCO3 solution and extracted with EtOAc (3×50 mL). The combined organic layers were washed with brine and dried over Na2SO4. After filtration and concentration, the crude product (250 mg) was purified by preparative HPLC (column: SunFire Prep C18, 150×19, 5 μm particle size; UV detection at 254 nm; flow 20 mL/min; mobile phase: A, water with 0.05% TFA; B, methanol; 40-70% B in A in 6 min). The product-containing eluate was partially concentrated under reduced pressure to remove MeOH. The residual solution was basified with saturated aqueous NaHCO3 solution and extracted with EtOAc (3×50 mL). The combined organic phases were washed with brine and dried over Na2SO4. Concentration gave the free amine (130 mg, 43%) as a white solid. LC-MS (ESI) m/z 375 (M+H+).

Provenance & Evidence