反应详情

A solution of methyl trans-4-{[(3-amino-5-oxo-4,5-dihydro-1,2,4-triazin-6-yl)methyl]carbamoyl}cyclohexanecarboxylate (2.00 g, 0.00646 mol) in 1,2-dichloroethane (130 mL) was charged with POCl3 (4.2 mL, 0.045 mol) and heated to reflux for 3 h. The reaction mixture was concentrated in vacuo then partitioned between EtOAc and sat. NaHCO3 and separated. The aqueous was re-extracted with EtOAc (3×) and the combined organic fractions were dried over Na2SO4, filtered, and concentrated in vacuo resulting in 1.43 g, (76% yield) of the title compound as an off-white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.43 (q, J=11.79 Hz, 2H), 1.61 (q, J=12.55 Hz, 2H), 1.85-2.11 (m, 4H), 2.38 (t, J=11.87 Hz, 1H), 2.98 (t, J=11.75 Hz, 1H), 3.61 (s, 3 H), 6.17 (br. s., 2 H), 7.49 (s, 1H) and 10.90 (br. s., 1H); MS (ES+): m/z 292.25 [MH+].

1. temperatureheated
2. temperatureto reflux for 3 h
3. concentrationThe reaction mixture was concentrated in vacuo
4. customthen partitioned between EtOAc and sat. NaHCO3
5. customseparated
6. extractionThe aqueous was re-extracted with EtOAc (3×)
7. dry with materialthe combined organic fractions were dried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated in vacuo