Trifluoroacetic acid → 4-(4-Amino-thiazolo[5,4-c]pyridin-2-yl)-3,5-dichloro-benzonitrile

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Reaction Steps

A mixture of [2-(2,6-dichloro-4-cyano-phenyl)-thiazolo[5,4-c]pyridin-4-yl]-carbamic acid tert-butyl ester (0.48 g, 1.14 mmol) and TFA (2 mL) in DCM (8 mL) was stirred at room temperature for 2 hours then concentrated to dryness under reduced pressure. The resultant residue was loaded onto an Isolute® SCX-2 cartridge which was washed with MeOH and the product eluted with 2M ammonia in isopropanol. The relevant fractions were combined and concentrated under reduced pressure to afford the title compound as a pale yellow solid (0.309 g, 82% yield). 1H NMR (300 MHz, CDCl3): δ 8.21 (d, J=5.8 Hz, 1H), 7.77 (s, 2H), 7.50 (d, J=5.8 Hz, 1H), 4.94 (s, 2H). LCMS (Method D): RT=2.04 min, m/z: 321 [M+H+].

Provenance & Evidence