反应详情

(S)-3-[6-(6-Methoxy-5-trifluoromethyl-pyridin-3-yl)-5,6,7,8-tetrahydro-pyrido[4,3-d]pyrimidin-4-yloxy]-pyrrolidine-1-carboxylic acid tert-butyl ester (1.0 g, 1.69 mmol) in CH2Cl2 (5 mL) was added 2M anhydrous HCl in diethyl ether (25.3 mL, 50.5 mmol) and the mixture stirred at rt for 3 h. The resulting precipitate was filtered and washed with diethyl ether to give 6-(6-methoxy-5-trifluoromethyl-pyridin-3-yl)-4-((S)-pyrrolidin-3-yloxy)-5,6,7,8-tetrahydro-pyrido[4,3-d]pyrimidine dihydrochloride as a yellow solid (1.01 g, 128% yield). [M+H]+=396.0, Rt(4)=0.71 min. The free base can be generated by partitioning the dihydrochloride salt between dichloromethane and 1N sodium hydroxide solution(aq), separating the organic phase and evaporating in vacuo. [M+H]+=396.0, Rt(4)=0.71 min.

1. filtrationThe resulting precipitate was filtered
2. washwashed with diethyl ether