反应 #554610

反应方程式

Ethyl 4,6-dibromo-3-(3-ethoxy-3-oxopropyl)-1H-indole-2-carboxylate

phenylboronic acid

potassium phosphate trihydrate

→

Ethyl 4,6-diphenyl-3-(3-ethoxy-3-oxopropyl)-1H-indole-2-carboxylate

溶剂

dioxane

反应条件

后处理

1. 1
   workup.ADDITIONwere added to the mixture
2. 2
   其他The microwave vial was capped
3. 3
   其他irradiated at 100 watt, 150° C., under pressure up to 10 bars
4. 4
   其他toluene was removed under reduced pressure
5. 5
   workup.DISSOLUTIONthe residue was dissolved in dichloromethane
6. 6
   洗涤washed with water
7. 7
   干燥The organic layer was dried over magnesium sulfate
8. 8
   过滤filtered
9. 9
   其他evaporated to dryness
10. 10
    其他The residue was purified by silica gel column chromatography
11. 11
    其他to yield a light-beige-colored solid in 60-70%

实验过程

Ethyl 4,6-dibromo-3-(3-ethoxy-3-oxopropyl)-1H-indole-2-carboxylate (0.244 g, 0.5 mmol), phenylboronic acid (0.147 g, 1.2 mmol, 2.4 equiv.) and potassium phosphate trihydrate (0.400 g, 1.5 mmol, 3.0 equiv.) were mixed together in a 10 ml microwave vial. The vial was purged with Argon and trans-dichlorobis(triphenylphosphine)-palladium (II) (0.021, 0.03 mmol, 6 mol %) and 5 ml of dry dioxane were added to the mixture. The microwave vial was capped and irradiated at 100 watt, 150° C., under pressure up to 10 bars. Then it was allowed to cool down to rt, and toluene was removed under reduced pressure and the residue was dissolved in dichloromethane and washed with water. The organic layer was dried over magnesium sulfate, filtered, and evaporated to dryness. The residue was purified by silica gel column chromatography using 20% of ethyl acetate/cyclohexane as eluent to yield a light-beige-colored solid in 60-70%. 1H-NMR (DMSO-d6) δ 1.09, 1.32 (each t, 3H, 3J=7.1 Hz, CH3); 2.11 (m, 2H, 2′-H); 2.84 (m, 2H, 1′-H); 3.89, 4.33 (each q, 2H, 4J=7.1 Hz, CH2); 7.12 (d, 1H, 2J=1.6 Hz, 7-H); 7.35 (t, 1H, 3J=7.4 Hz, Ph-ring); 7.43 (m, 7H, Ph-ring); 7.67 (d, 1H, 2J=0.9 Hz, 5-H); 7.68 (d, 1H, 2J=1.6 Hz, Phenyl-ring); 11.84 (s, 1H, NH). 13C-NMR (DMSO-d6) δ 14.2, 14.3 (2CH3, each C═OOCH2CH3); 20.5 (C-2′); 34.8 (C-1′); 59.5, 60.5 (2CH2, each C═OOCH2CH3); 109.6 (C-5); 121.1 (C-7); 121.8 (C-3); 123.6 (C-2); 124.7 (C-3a); 127.0 (C-2″, C-6″); 127.4 (C-4″′); 127.5 (C-4″); 128.0 (C-3″′, C-5″′); 129.0 (C-3″, C-5″); 129.1 (C-2″′, C-6″′); 136.7 (C-7a); 137.4 (C-4), 137.6 (C-6); 140.7 (C-1″); 140.8 (C-1″′); 161.5 (2′-CO2Et); 171.7 (2-CO2Et). LC-MS (m/z): 442 [M]+, 440 [M]−. Purity (LC-MS): 96%.

来源