Cyclopropylthiourea → cyclopropyl-[4-(1H-pyrrolo[2,3-b]pyridin-3-yl)-thiazol-2-yl]-amine

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A mixture of 2-Bromo-1-(1H-pyrrolo[2,3-b]pyridin-3-yl)-ethanone (prepared according to Galvez C. et al, J. Het. Chem. 21, 1984, p421-423) (0.90 g, 3.76 mmol) and cyclopropyl-thiourea (prepared according to Marletta, M. et al, J. Med. Chem. 35, 1992, p1137-1144) (0.46 g, 3.96 mmol) was heated in ethanol (20 mL), at reflux for 4 hours. The reaction mixture was cooled to 0° C. with and ice-water bath, then the solids were filtered and dried to give cyclopropyl-[4-(1H-pyrrolo[2,3-b]pyridin-3-yl)-thiazol-2-yl]-amine as a tan solid (1.2 g, 92%). LC/MS MH+ =257.02, LC/MS RT: 1.62 min. 1H NMR (500 MHz, DMSO-d6, ppm) 12.22 (s,1H), 9.20 (bs,1H), 8.42 (d,1H, J=7.82 Hz), 8.36 (dd,1H, J=4.81, 1.22 Hz), 8.00 (s,1H), 7.25 (m,1H), 6.12 (s,1H), 2.77 (t, 1H,J=4.75), 0.86 (m,2H), 0.71 (m,2H).

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