Methyl 3-(4-Iodophenyl)propanoate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stiffed solution of 3-(4-iodophenyl)propanoic acid (commercially available) in toluene and methanol (9:1, 0.2 M) 0° C. was added (diazomethyl)trimethylsilane (1 N solution in Et2O, 2 eq). After stiffing at room temperature overnight the reaction mixture was concentrated under vacuum and the resulting crude residue was purified by chromatography (silica gel, 20-50% EtOAc in hexanes) to afford methyl 3-(4-iodophenyl)propanoate. the reaction mixture was concentrated under vacuum the resulting crude residue was purified by chromatography (silica gel, 20-50% EtOAc in hexanes)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stiffed solution of 3-(4-iodophenyl)propanoic acid (commercially available) in toluene and methanol (9:1, 0.2 M) 0° C. was added (diazomethyl)trimethylsilane (1 N solution in Et2O, 2 eq). After stiffing at room temperature overnight the reaction mixture was concentrated under vacuum and the resulting crude residue was purified by chromatography (silica gel, 20-50% EtOAc in hexanes) to afford methyl 3-(4-iodophenyl)propanoate. the reaction mixture was concentrated under vacuum the resulting crude residue was purified by chromatography (silica gel, 20-50% EtOAc in hexanes)

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 40 ml of triethylamine were added 3.68 g of methyl p-iododihydrocinnamate, 1.49 g of 5-hexyl-1-ol, 40 ml of cuprous iodide and 77 mg of bis(triphenylphosphine)-palladium chloride, and the mixture was stirred under nitrogen flow for 2.5 hours. After adding 50 ml of ethyl acetate, the mixture was filtered to remove the resulting precipitate, washed three-times with 30 ml of water, dried over magnesium sulfate, and evaporated under a reduced pressure to obtain 4.0 g of methyl p-(6-hydroxy-1-hexynyl)dihydrocinnamate as an oil. 4.0 g of this oil was stirred with 1.2 g of 5% palladium on carbon in 50 ml of methanol under a hydrogen atmosphere to obtain 2.41 g of methyl p-(6-hydroxyhexyl)dihydrocinnamate. To this compound was added 1.0 g of phosphorus tribromide with ice-cooling, and the mixture was heated at 80° C. for 2 hours, poured into 50 ml of ice-water. The mixture was extracted twice with 50 ml of ethyl acetate, dried over magnesium sulfate and evaporated under a reduced pressure to obtain a residue, which was then applied to a silica gel column and eluted with chloroform/hexane (1:1) to obtain 2.1 g of the title compound as a colorless oil. the mixture was filtered to remove the resulting precipitate washed three-times with 30 ml of water dried over magnesium sulfate evaporated under a reduced pressure

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared from methyl 3-(4-iodophenyl)propanoate (100 mg, 0.34 mmol) and 3-ethynylphenol (0.025 mL, 0.38 mmol) according to the general procedure IC to give 66 mg (69%) of a light brown solid after purification by flash chromatography (SiO2, EtOAc:PE, 1:6→1:0). Rf=0.24 (EtOAc:PE; 1:2); 1H NMR (CDCl3): δ 7.43 (d, J=8.0 Hz, 2H), 7.20-7.15 (m, 3H), 7.10-7.08 (m, 1H), 7.00-6.99 (m, 1H), 6.84-6.80 (m, 1H), 5.50 (br, 1H), 3.68 (s, 3H), 2.96 (t, J=8.0 Hz, 2H), 2.64 (t, J=8.1 Hz, 2H); 13C NMR (CDCl3): δ 173.7, 155.7, 141.0, 132.0, 129.8, 128.5, 124.7, 124.4, 121.3, 118.4, 115.9, 89.4, 89.0, 52.0, 35.6, 31.0; ESI-MS m/z 303.0 (M+Na+).

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared from methyl 3-(4-iodophenyl)propanoate (90 mg, 0.31 mmol) and 1-ethynyl-2-methoxybenzen (40 μL, 0.31 mmol) according to the general procedure IC to give 86 mg (94%) of a pure orange-brown oil. Rf=0.44 (EtOAc:PE; 1:2); 1H NMR (CDCl3): δ 7.48 (d, J=8.1 Hz, 3H) 7.29-7.22 (m, 1H) 7.16 (d, J=8.2, 2H) 6.95-6.88 (m, 2H) 3.90 (s, 3H) 3.66 (s, 3H) 2.95 (t, J=7.6 Hz, 2H) 2.63 (t, J=7.6 Hz, 2H); 13C NMR (CDCl3): δ 173.3, 160.1, 140.8, 133.7, 132.0, 129.8, 128.4, 121.7, 120.6, 112.7, 110.9, 93.5, 85.6, 56.0, 51.8, 35.6, 31.0; ESI-MS m/z 317.0 (M+Na+).

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared from methyl 3-(4-iodophenyl)propanoate (120 mg, 0.41 mmol) and 1,3-diethynylbenzene (0.06 mL, 0.45 mmol) according to the general procedure IC, with the exception that the reaction was performed at room temperature, to give 52 mg (43%) of an yellow-brown gummy oil after purification by flash chromatography (SiO2, EtOAc/hexanes, 1:3). Rf: 0.41 (EtOAc:hexanes, 1:2); 1HNMR (CDCl3) δ 7.65 (s, 1H), 7.49-7.42 (m, 4H), 6.31-7.29 (m, 1H), 7.19-7.17 (m, 2H), 3.67 (s, 3H), 3.09 (s, 1H), 2.99-2.93 (t, 2H, J=7.8 Hz), 2.66-2.61 (t, 2H, J=7.8 Hz); 13CNMR (CDCl3) δ 173.0, 141.1, 135.0, 131.8, 131.7, 128.4, 123.7, 122.4, 120.8, 90.0, 88.0, 82.8, 77.7, 51.6, 35.3, 30.8; EI-MS m/z 288 (M+). was performed at room temperature