반응 #45474
ord-243024e82f2243f2871d2863333f8cf7
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반응물
시약
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후처리
- 1온도the mixture was heated for another 24 hours
- 2온도the mixture was heated for another 24 hours after which time all starting material
- 3기타was consumed
- 4기타The solvent was removed in vacuo
- 5기타the residue was triturated with water (30 mL) for 3 hours
- 6여과The solid was collected by filtration
- 7기타dried in vacuo
- 8기타The acetone was removed in vacuo
- 9여과the precipitate was filtered
- 10세척washing with water
- 11기타The precipitate was triturated with 2-propanol (30 mL) for 1 hour
- 12기타The solvent was removed an the residue
- 13기타was partitioned between dichloromethane (20 mL) and water (40 mL)
- 14건조The organic layer was dried over anhydrous magnesium sulfate
- 15기타the solvent was removed in vacuo
실험 절차
A mixture of N-[4-(4-amino-7-iodofuro[3,2-c]pyridin-3-yl)-2-methoxyphenyl]-1-methyl-1H-benzimidazole-2-carboxamide (1.50 g, 2.78 mmol) in 1,2-dimethoxyethane (30 mL) and water (15 mL) was reacted 2-[(E)-3,3-diethoxy-1-propenyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.42 g, 5.56 mmol,), sodium carbonate (1.17 g, 11.12 mmol) and tetrakis triphenylphosphine palladium (0) (0.19 g, 0.17 mmol) at 80° C. for 18 hours. Additional 2-[(E)-3,3-diethoxy-1-propenyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.00 g, 3.90 mmol,), sodium carbonate (0.508 g, 4.80 mmol) and tetrakis triphenylphosphine palladium (0) (0.19 g, 0.17 mmol) was added and the mixture was heated for another 24 hours. Additional tetrakis triphenylphosphine palladium (0) (0.32 g, 0.27 mmol) was added and the mixture was heated for another 24 hours after which time all starting material was consumed. The solvent was removed in vacuo and the residue was triturated with water (30 mL) for 3 hours. The solid was collected by filtration and dried in vacuo. The crude product was suspended in acetone (60 mL) and water (8 mL) and reacted with p-toluenesulfonic acid monohydrate (0.10 g, 0.52 mmol) at ambient temperature for eighteen hours. The acetone was removed in vacuo and the precipitate was filtered, washing with water. The precipitate was triturated with 2-propanol (30 mL) for 1 hour. The solvent was removed an the residue was partitioned between dichloromethane (20 mL) and water (40 mL). The organic layer was dried over anhydrous magnesium sulfate and the solvent was removed in vacuo to give the title compound (0.48 g, 31%) as a yellow solid. 1H NMR (DMSO-d6, 400 MHz) δ 10.19 (s, 1H), 9.64 (d, 1H), 8.52 (dd, 1H), 8.26 (s, 1H), 8.21 (s, 1H), 7.86 (d, 1H), 7.75-7.82 (m, 2H), 7.47 (t, 1H), 7.39 (t, 1H), 7.32 (d, 1H), 7.21 (dd, 1H), 6.93 (dd, 1H), 4.25 (s, 3H), 4.04 (s, 3H), 1.86 (s, 3H); RP-HPLC (Conditions g) Rt 12.21 min.; MS: MH+ 468.