Diethyl Ether → 2-(3-([7-(3-chloropropoxy)quinazolin-4-yl]amino}-1H-pyrazol-5-yl)-N-(2,3-difluorophenyl)acetamide

Participants

Reaction Conditions

Reaction Steps

2,3-difluoroaniline (1.15 g, 8.95 mmol) was added to a suspension of (3-{[7-(3-chloropropoxy)quinazolin-4-yl]amino}-1H-pyrazol-5-yl)acetic acid (2.70 g, 7.46 mmol) in pyridine (30 ml) and the reaction cooled to 0° C. Phosphorous oxychloride (1.14 g, 7.46 mmol) was added dropwise and the reaction stirred at 0° C. for 1 hour. The reaction was warmed to ambient temperature and more phosphorous oxychloride (0.5 ml) added. The reaction was stirred for 4.5 hours. The reaction mixture was diluted with ethyl acetate:ether (100 ml: 37 ml) and stirred for 18 hours. The precipitate was filtered, suspended in water and neutralised with ammonium hydroxide (7%, 15 ml). The resultant yellow suspension was filtered, washed with water and dried (phosphorous pentoxide) to yield 2-(3-{[7-(3-chloropropoxy)quinazolin-4-yl]amino}-1H-pyrazol-5-yl)-N-(2,3-difluorophenyl)acetamide as an orange powder (3.15 g, 89% yield):

Provenance & Evidence