反应详情

Cold (0° C.) 4 NHCl in dioxanes (5 mL) was added via syringe to (S)-tert-butyl 2-(5-(2-chloropyrimidin-5-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate (152d-1, 0.50 g, 1.43 mmol) in a 100 mL pear-shaped flask followed by MeOH (1.0 mL). The suspension was stirred at room temperature for 4 h before it was concentrated down to dryness and placed under high vacuum for 1 h. There was isolated intermediate (S)-2-chloro-5-(2-(pyrrolidin-2-yl)-1H-imidazol-5-yl)pyrimidine trihydrochloride as a pale yellow solid (with an orange tint) which was used without further purification.

1. concentrationwas concentrated down to dryness
2. waitplaced under high vacuum for 1 h