Hydrochloric Acid → 3-(7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-furan-2-carboxylic acid methyl ester

Participants

Reaction Steps

A suspension of 6-chloro-7-deazapurine (100.00 mg; 0.65 mmol), methyl 3-amino-2-furoate (138 mg; 0.98 mmol) and concentrated hydrochloric acid (55 μL; 0.65 mmol) in tert-butanol (2 mL) was microwaved at 75° C. for 3 h. The reaction mixture was diluted with methanol (2 mL) and purified by chromatography on a SP1 Biotage system, using dichloromethane and methanol as eluents to afford 3-(7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-furan-2-carboxylic acid methyl ester (30 mg, 18%) as a white solid. (HPLC: 99%, RT: 5.43 min). 1H NMR (DMSO-d6) 12.03 (br s, 1H), 8.99 (br s, 1H), 8.40 (s, 1H), 7.90 (d, J=2.2 Hz, 1H), 7.71 (d, J=1.8 Hz, 1H), 7.38 (dd, J=3.3, 2.2 Hz, 1H), 6.60 (dd, J=3.3, 1.8 Hz, 1H), 3.90 (s, 3H); MS (m/z) 259 [M+H]+.

Provenance & Evidence