Dimethylformamide → N3-(5-(5-(3,3-difluorocyclobutyl)-1,2,4-oxadiazol-3-yl)-2-methylphenyl)imidazo[1,2-a]pyridine-3,6-dicarboxamide

온도

0 °C

To a stirring suspension of 6-carbamoylimidazo[1,2-a]pyridine-3-carboxylic acid (110) (50 mg, 0.172 mmol) in anhydrous dichloromethane (2 mL) at 0° C. under Argon was added dropwise oxalyl chloride (16 uL, 0.189 mmol). Then, a drop of anhydrous N,N-dimethylformamide was added and the reaction mixture was stirred at 0° C. for 1 hour. The solvent was concentrated. A stirring mixture of the acid chloride and methyl 5-(5-(3,3-difluorocyclobutyl)-1,2,4-oxadiazol-3-yl)-2-methylaniline (37) (23 mg, 0.0861 mmol) in anhydrous pyridine (2 mL) was stirred at room temperature for 20 minutes. The crude product was purified by reverse phase preparative HPLC to give N3-(5-(5-(3,3-difluorocyclobutyl)-1,2,4-oxadiazol-3-yl)-2-methylphenyl)imidazo[1,2-a]pyridine-3,6-dicarboxamide (F62). 1H NMR (400 MHz, d6-DMSO) δ 10.18 (s, 1H), 9.99-9.98 (m, 1H), 8.68 (s, 1H), 8.28 (s, 1H), 8.10 (d, J=1.6 Hz, 1H), 7.98 (dd, J=1.6, 9.2 Hz, 1H), 7.88-7.83 (m, 2H), 7.66 (s, 1H), 7.52 (d, J=8.0 Hz, 1H), 3.91-3.84 (m, 1H), 3.22-3.06 (m, 4H), 2.38 (s, 3H). MS m/z 452.14 (M+1)+.

1. concentrationThe solvent was concentrated
2. stirringwas stirred at room temperature for 20 minutes
3. customThe crude product was purified by reverse phase preparative HPLC

ORD 기록

ord-e0d96b0a59604984a6a447fa1e3f73dc

출처 데이터셋

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US09199981B2