2,6-Dimethylmorpholine, cis- → (2R)-1-[(5-amino-7-methoxy-2,3-dihydroimidazo[1,2-c]quinazolin-8-yl)oxy]-3-[(2R,6S)-2,6-dimethylmorpholin-4-yl]propan-2-ol

Participants

Reaction Steps

A solution of 7-Methoxy-8-[(2R)-oxiran-2-ylmethoxy]-2,3-dihydroimidazo[1,2-c]quinazolin-5-amine (Intermediate F, 1.50 g, 5.20 mmol) and cis-2,6-dimethylmorpholine (6.4 mL, 52.0 mmol, 10 equiv.) in DMF (36 mL) was heated in two portions in a microwave reactor for 45 min. at 140° C. The resulting combined mixtures were concentrated under reduced pressure and purified using MPLC to give N-[8-({(2R)-3-[(2R,6S)-2,6-dimethylmorpholin-4-yl]-2-hydroxypropyl}oxy)-7-methoxy-2,3-dihydroimidazo[1,2-c]quinazolin-5-yl]amine (2.02 g, 96%): Preparative HPLC ret. time 4.29 min.; 1H NMR (DMSO-d6+1 drop TFA-d) δ 1.10 (d, J=7.3 Hz, 3H), 1.14 (d, J=7.3 Hz, 3H), 2.69 (t, J=11.6 Hz, 1H), 2.76 (t, J=11.6 Hz, 1H), 3.23-3.32 (m, 2H), 3.43-3.54 (m, 2H), 3.80 (s, 3H), 3.81-3.87 (m, 1H), 3.88-3.97 (m, 1H), 4.31 (app dd, J=8.6, 12.1 Hz, 2H), 4.35-4.43 (m, 1H), 7.22 (J=9.4 Hz, 1H), 7.81 (d, J=9.1 Hz, 1H); mass spectrum m/z 404 ((M+1)+, 100%).

Provenance & Evidence