3-Chloro-8-thia-4,6-diazatricyclo[7.4.0.0,2,7]trideca-1(9),2,4,6-tetraene → (5,6,7,8-Tetrahydro-benzo[4,5]thieno[2,3-d]pyrimidine-4-yl)-1,3-diaminopropane

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A solution of 4-chloro-5,6,7,8-tetrahydro-benzo[4,5]thieno[2,3-d]pyrimidine (0.5 g, 2.43 m. mol) in 1,3-diaminepropane (5 ml) was heated at 80° C. for 1 day. It was cooled to room temperature and then diluted with water (50 mL). The clear solution was cooled at 0° C. for over night. The resulting solid was filtered and dried to get the title compound (0.3 g, 52%) as a brown color solid. 1H NMR (400 MHz, CD3OD): δ 8.20 (s, 1H), 3.65 (t, 2H), 2.95 (m, 2H), 2.80 (m, 4H), 1.80–2.00 (m, 6H). MS (ESI) m/z: Calculated: 262.37; Observed: 263.1 (M++1).

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