Ammonia methanol → 12-N-[4-(dimethylamino)cyclohexyl]-7-thia-9,11-diazatricyclo[6.4.0.0[2,6]]dodeca-1(8),2(6),9,11-tetraene-10,12-diamine

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Reaction Conditions

Reaction Steps

A 20-mL sealed tube containing a solution of 4-N-[10-chloro-7-thia-9,11-diazatricyclo[6.4.0.0[2,6]]dodeca-1(8),2(6),9,11-tetraen-12-yl]-1-N,1-N-dimethylcyclohexane-1,4-diamine (80 mg, 0.23 mmol, 1.00 equiv) in 10 mL of saturated methanol-NH3 solution. The resulting solution was stirred overnight at 140° C. in an oil bath and concentrated under vacuum. The crude product (80 mg) was purified by Prep-HPLC with the following conditions (SHIMADZU): Column, SunFire Prep C18, 19*150 mm 5 um; mobile phase, water with 0.05% NH4HCO3 and CH3CN (6.0% CH3CN up to 50.0% in 12 min); UV detection at 254 nm. This resulted 12-N-[4-(dimethylamino)cyclohexyl]-7-thia-9,11-diazatricyclo[6.4.0.0[2,6]]dodeca-1(8),2(6),9,11-tetraene-10,12-diamine (13 mg, 17%) was obtained as a brown solid. MS (ES, m/z) 332 [M+H]+; 1H NMR (300 MHz, CDCl3): δ 4.61 (s, 3H), 3.87-3.97 (m, 1H), 2.80-2.83 (m, 4H), 2.35-2.45 (m, 2H), 2.24 (s, 6H), 2.01-2.18 (m, 3H), 1.86 (s, 3H), 1.29-1.41 (dd, 2H), 1.14-1.18 (t, 3H).

Provenance & Evidence