反应详情

温度

100 °C

To a solution of (R)-7-bromo-6-(1,3-dimethyl-azetidin-3-ylamino)-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one (1.2 g, 3.04 mmol) and (E)-2-(2-ethoxyvinyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.66 g, 3.35 mmol) in a mixture of dioxane (12 mL) and water (2 mL) was added PdCl2(dppf)-CH2Cl2 adduct (0.25 g, 0.30 mmol) and K2CO3 (0.842 g, 6.09 mmol). The mixture was stirred at 100° C. for 3 h. The mixture was cooled to ambient temperature and the solvent was removed in vacuo to give the residue product, which was purified by chromatography on silica gel (eluting with 10% MeOH in dichloromethane) to give (R)-6-(1,3-dimethyl-azetidin-3-ylamino)-7-((E)-2-ethoxy-vinyl)-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one (0.8 g, 68%) 1H NMR (400 MHz, CDCl3) δ=8.20 (s, 1H), 6.80 (s, 1H), 6.71 (d, J=12.4 Hz, 1H), 5.90 (s, 1H), 5.64 (d, J=12.4 Hz, 1H), 4.63-4.46 (m, 3H), 3.91 (q, J=6.8 Hz, 2H), 3.53 (m, 2H), 3.27 (m, 2H), 2.43 (s, 3H), 1.61 (s, 3H), 1.50 (d, J=6.8 Hz, 3H), 1.35 (t, J=6.8 Hz, 3H). LC/MS (Table 1, Method 2) Rt=0.889 min; MS m/z: 386 [M+H]+.

1. temperatureThe mixture was cooled to ambient temperature
2. customthe solvent was removed in vacuo
3. customto give the residue product, which
4. customwas purified by chromatography on silica gel (eluting with 10% MeOH in dichloromethane)