Azetidine → (2R)-1-[(5-amino-7-methoxy-2,3-dihydroimidazo[1,2-c]quinazolin-8-yl)oxy]-3-(azetidin-1-yl)propan-2-ol

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A solution of 7-Methoxy-8-[(2R)-oxiran-2-ylmethoxy]-2,3-dihydroimidazo[1,2-c]quinazolin-5-amine (Intermediate F, 0.35 g, 1.21 mmol) and azetidine (0.82 mL, 12.1 mmol, 10 equiv.) in DMF (10 mL) was heated in a microwave reactor for 45 min. at 140° C. The resulting mixture was concentrated under reduced pressure and purified using MPLC to give N-(8-{[(2R)-3-(azetidin-1-yl)-2-hydroxypropyl]oxy}-7-methoxy-2,3-dihydroimidazo[1,2-c]quinazolin-5-yl)amine (0.48 g, 115%): HPLC ret. time 0.67 min.; mass spectrum m/z 346 ((M+1)+, 100%).

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