反应详情

A mixture of 1-(1H-pyrrolo[2,3-c]pyridin-2-yl)ethanone (Example 70) (90 mg, 0.56 mmol) and aminoguanidine hydrochloride (65 mg, 0.59 mmol) in ethanol (5.6 mL) and 6 N HCl (0.47 mL) was heated under reflux for 1.5 h. The reaction mixture was cooled to room temperature and the precipitate was filtered, rinsed with ethanol and diethyl ether, and dried under vacuum at 45° C. to provide [[1-(1H-pyrrolo[2,3-c]pyridin-2-yl)ethylidene]amino]guanidine dihydrochloride (138 mg, 86%) as a white solid: mp 314-318° C. dec.; 1H NMR (300 MHz, CD3OD) δ2.50 (3H, s), 7.40 (1H, s), 8.10-8.27 (2H, m), 9.04 (1H, s); ESI MS m/z 217 [C10H12N6+H]+; HPLC (Method A) >99% (AUC), tR=9.01 min.

1. temperaturewas heated
2. temperatureunder reflux for 1.5 h
3. filtrationthe precipitate was filtered
4. washrinsed with ethanol and diethyl ether
5. customdried under vacuum at 45° C.