Ethylamine → HCID 67279226, compound

Participants

Reaction Steps

To a crude solution of intermediate 17, 3-(3-chloro-4-((pyrrolidin-1-yl)methyl)phenyl)-3-hydroxycyclobutanecarboxylic acid (˜30 mL, ˜34.5 mmol) was added 2.0M ethylamine in THF (34.5 mL, 69 mmol) and T3P (50% solution in EtOAc, 33 ml, 51.8 mmol). The resulting reaction mixture was stirred at RT for 1 hr and then 300 ml of 1N NaOH and 400 ml of EtOAc were added and the layers were separated. The aqueous layer was subjected to EtOAc extraction (2×500 ml) again and the combined organic layers were dried over MgSO4 and evaporated. The residue was purified by flash column chromatography using a 75M Biotage™ column, eluting with a gradient of 5%, 8%, 10%, 15% MeOH/CH2Cl2 with 0.25% NH4OH. The product containing fractions were collected and concentrated under reduced pressure to give the title compound (4.0 g, 35% yield). Rf=0.40 (15% MeOH/CH2Cl2+0.2% NH4OH), LRMS m/z Calcd for C18H25ClN2O2, 336.9, found, 337.4 (M+H) APCI; 1H-NMR (CDCl3) δ 7.54 (dd, J=8.3, 2.7 Hz, 1H), 7.49-7.45 (m, 1H), 7.33 (d, J=7.9 Hz, 1H), 6.52-6.35 (br m, 1H), 3.86 (s, 2H), 3.29-3.22 (m, 2H), 2.81-2.60 (m, 7H), 2.48 (d, J=8.3 Hz, 2H), 1.83 (br s, 4H), 1.11 (dt, J=7.3, 2.9 Hz, 3H); 13C-NMR (CDCl3) δ 176.7, 147.0, 134.2, 133.3, 131.4, 126.5, 123.8, 73.8, 73.9, 56.1, 54.1, 41.2, 35.0, 33.0, 23.6, 14.9.

Provenance & Evidence