2-(4-methoxyphenyl)-1-phenylethanone

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-(4-methoxyphenyl)-1-phenylethanone (100 mg, 0.44 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (93 mg, 0.44 mmol), and urea (60 mg, 1.32 mmol) in 20 mL of ethanol was added 0.2 mL of concentrated HCl, the mixture was stirred at reflux for 4 days. After the solvent was removed under reduced pressure, the residue was purified by thin layer chromatography (PE:EtOAc=1:2) to give Compound 19 (22 mg, yield 10.8%). 1H NMR (CD3OD 400 MHz): δ7.55 (s, 1H), 7.20 (s, 5H), 7.12 (s, 1H), 6.73 (d, J=8.4 Hz, 2H), 6.57 (d, J=8.8 Hz, 2H), 5.25 (s, 1H), 4.05-4.00 (m, 2H), 3.61 (s, 3H), 1.35 (t, J=6.8 Hz, 3H); MS (ESI): m/z 462.2 [M+1]+. at reflux for 4 days After the solvent was removed under reduced pressure the residue was purified by thin layer chromatography (PE:EtOAc=1:2)

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-(4-methoxyphenyl)-1-phenylethanone (100 mg, 0.44 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (93 mg, 0.44 mmol), and urea (60 mg, 1.32 mmol) in 20 mL of ethanol was added 0.2 mL of concentrated HCl, the mixture was stirred at reflux for 4 days. After the solvent was removed under reduced pressure, the residue was purified by thin layer chromatography (PE:EtOAc=1:2) to give Compound 19 (22 mg, yield 10.8%). 1H NMR (CD3OD 400 MHz): δ 7.55 (s, 1H), 7.20 (s, 5H), 7.12 (s, 1H), 6.73 (d, J=8.4 Hz, 2H), 6.57 (d, J=8.8 Hz, 2H), 5.25 (s, 1H), 4.05-4.00 (m, 2H), 3.61 (s, 3H), 1.35 (t, J=6.8 Hz, 3H); MS (ESI): m/z 462.2 [M+1]+. at reflux for 4 days After the solvent was removed under reduced pressure the residue was purified by thin layer chromatography (PE:EtOAc=1:2)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: This reaction is carried out in the same manner as the reaction in example 3. The difference is that, the reactants are p-methoxyphenyl chloride (142.2 mg, 1.0 mmol), acetophenone (302.1 mg, 2.5 mmol), palladium cinnamyl chloride (7.8 mg, 0.015 mmol), 2-Methoxy-6-(N-methyl-N-phenyl-amino)phenyldicyclohexyl)phosphine (18.4 mg, 0.045 mmol), K3PO43H2O (664.0 mg, 2.5 mmol) in 3 mL dry toluene at 110° C. for 16.7 h. 2-(4′-Methoxyphenyl)-1-phenyl-1-ethanone (177.3 mg) was obtained with a yield of 79% as solid. m.p.: 94.1-94.4° C. (n-hexane); 1H NMR (300 MHz, CDCl3) δ 8.07-8.00 (m, 2H, ArH), 7.60-7.51 (m, 1H, ArH), 7.51-7.42 (m, 2H, ArH), 7.25-7.17 (m, 2H, ArH), 6.92-6.86 (m, 2H, ArH), 4.24 (s, 2H, CH2), 3.78 (s, 3H, OCH3); 13C NMR (75 MHz, CDCl3) δ 197.8, 158.3, 136.4, 132.9, 130.3, 128.45, 128.41, 126.3, 113.9, 55.0, 44.4; IR (KBr) v (cm−1) 3056, 2998, 2954, 2934, 2905, 2835, 1691, 1612, 1596, 1579, 1514, 1463, 1447, 1411, 1335, 1301, 1245, 1218, 1204, 1178, 1107, 1035; MS (70 eV, EI) m/z (%): 227 (M++1, 3.58), 226 (M+, 21.25), 121 (100). This reaction is carried out in the same manner as the reaction in example 3 at 110° C. for 16.7 h

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 3-(4-chlorophenyl)-5-(piperazin-1-yl)-1,2,4-thiadiazole (100 mg, 356 μmol), 4-methoxyphenylacetophenone (64.3 mg, 392 μmol) and titanium IV propoxide (152 mg, 158 μl, 534 μmol) in 2 mL THF was stirred for 3 h at RT. NaBH4 (40.4 mg, 1.07 mmol) was added in three portions. MeOH (0.2 mL) was added and stirred over the weekend at RT. Water (5 mL), EtOAc (10 mL) and aq. 2N NaOH (3 mL) was added, stirred for 10 min and filtered over a dicalit-plug. The aqueous layer was separated and extracted once with EtOAc (20 mL). The organic layers were washed with brine (1×20 mL), dried over Na2SO4, filtered off and concentrated in vacuo. The residue was purified by column chromatography on silica eluting with a gradient formed from heptane and EtOAc and again with preparative HPLC to yield, after evaporation of the product containing fraction, 39 mg (25%) of the title compound as off-white solid. MS (m/e): 429.2 (MH+). stirred over the weekend at RT stirred for 10 min filtered over a dicalit-plug The aqueous layer was separated extracted once with EtOAc (20 mL) The organic layers were washed with brine (1×20 mL) dried over Na2SO4 filtered off concentrated in vacuo The residue was purified by column chromatography on silica eluting with a gradient formed from heptane and EtOAc and again with preparative HPLC to yield after evaporation of the product containing fraction, 39 mg (25%) of the title compound as off-white solid

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 3-(4-chlorophenyl)-5-(piperazin-1-yl)-1,2,4-thiadiazole (100 mg, 356 μmol), 4-methoxyphenylacetophenone (64.3 mg, 392 μmol) and titanium IV propoxide (152 mg, 158 μl, 534 μmol) in 2 mL THF was stirred for 3 h at RT. NaBH4 (40.4 mg, 1.07 mmol) was added in three portions. MeOH (0.2 mL) was added and stirred over the weekend at RT. Water (5 mL), EtOAc (10 mL) and aq. 2N NaOH (3 mL) was added, stirred for 10 min and filtered over a dicalit-plug. The aqueous layer was separated and extracted once with EtOAc (20 mL). The organic layers were washed with brine (1×20 mL), dried over Na2SO4, filtered off and concentrated in vacuo. The residue was purified by column chromatography on silica eluting with a gradient formed from heptane and EtOAc and again with preparative HPLC to yield, after evaporation of the product containing fraction, 39 mg (25%) of the title compound as off-white solid. MS (m/e): 429.2 (MH+). stirred over the weekend at RT stirred for 10 min filtered over a dicalit-plug The aqueous layer was separated extracted once with EtOAc (20 mL) The organic layers were washed with brine (1×20 mL) dried over Na2SO4 filtered off concentrated in vacuo The residue was purified by column chromatography on silica eluting with a gradient formed from heptane and EtOAc and again with preparative HPLC to yield after evaporation of the product containing fraction, 39 mg (25%) of the title compound as off-white solid

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-(4-methoxyphenyl)-1-phenylethanone (100 mg, 0.44 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (93 mg, 0.44 mmol), and urea (60 mg, 1.32 mmol) in 20 mL of ethanol was added 0.2 mL of concentrated HCl, the mixture was stirred at reflux for 4 days. After the solvent was removed under reduced pressure, the residue was purified by thin layer chromatography (PE:EtOAc=1:2) to give Compound 19 (22 mg, yield 10.8%). 1H NMR (CD3OD 400 MHz): δ7.55 (s, 1H), 7.20 (s, 5H), 7.12 (s, 1H), 6.73 (d, J=8.4 Hz, 2H), 6.57 (d, J=8.8 Hz, 2H), 5.25 (s, 1H), 4.05-4.00 (m, 2H), 3.61 (s, 3H), 1.35 (t, J=6.8 Hz, 3H); MS (ESI): m/z 462.2 [M+1]+. at reflux for 4 days After the solvent was removed under reduced pressure the residue was purified by thin layer chromatography (PE:EtOAc=1:2)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-(4-methoxyphenyl)-1-phenylethanone (100 mg, 0.44 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (93 mg, 0.44 mmol), and urea (60 mg, 1.32 mmol) in 20 mL of ethanol was added 0.2 mL of concentrated HCl, the mixture was stirred at reflux for 4 days. After the solvent was removed under reduced pressure, the residue was purified by thin layer chromatography (PE:EtOAc=1:2) to give Compound 19 (22 mg, yield 10.8%). 1H NMR (CD3OD 400 MHz): δ7.55 (s, 1H), 7.20 (s, 5H), 7.12 (s, 1H), 6.73 (d, J=8.4 Hz, 2H), 6.57 (d, J=8.8 Hz, 2H), 5.25 (s, 1H), 4.05-4.00 (m, 2H), 3.61 (s, 3H), 1.35 (t, J=6.8 Hz, 3H); MS (ESI): m/z 462.2 [M+1]+. at reflux for 4 days After the solvent was removed under reduced pressure the residue was purified by thin layer chromatography (PE:EtOAc=1:2)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 1-phenyl-2-(4-methoxyphenyl)-ethanone (Aldrich) (22.6 g, 0.1 mol), ethyl carbazate (12.5 g, 0.12 mol) and a spatula tip of TsOH in toluene (200 ml) was heated to reflux, and water was azeotropically removed. The reaction was complete (by TLC) after 4 hours. The solvent was removed under reduced pressure, and the crude solid was chromatographed, SiO2 (400 g), eluting with Hex/EtOAc, 7/3, affording 9 (24.0 g, 76.9%). to reflux water was azeotropically removed after 4 hours The solvent was removed under reduced pressure the crude solid was chromatographed SiO2 (400 g), eluting with Hex/EtOAc, 7/3

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-(4-methoxyphenyl)-1-phenylethanone (100 mg, 0.44 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (93 mg, 0.44 mmol), and urea (60 mg, 1.32 mmol) in 20 mL of ethanol was added 0.2 mL of concentrated HCl, the mixture was stirred at reflux for 4 days. After the solvent was removed under reduced pressure, the residue was purified by thin layer chromatography (PE:EtOAc=1:2) to give Compound 19 (22 mg, yield 10.8%). 1H NMR (CD3OD 400 MHz): δ 7.55 (s, 1H), 7.20 (s, 5H), 7.12 (s, 1H), 6.73 (d, J=8.4 Hz, 2H), 6.57 (d, J=8.8 Hz, 2H), 5.25 (s, 1H), 4.05-4.00 (m, 2H), 3.61 (s, 3H), 1.35 (t, J=6.8 Hz, 3H); MS (ESI): m/z 462.2 [M+1]+. at reflux for 4 days After the solvent was removed under reduced pressure the residue was purified by thin layer chromatography (PE:EtOAc=1:2)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1-Phenyl-2-(4-methoxyphenyl)ethanone was prepared from benzene and 4-methoxyphenylacetyl chloride (prepared by heating the commercially available carboxylic acid in thionyl chloride and subsequent concentration) using the method described in step A of Example 9. 1-Phenyl-2-(4-methoxyphenyl)ethanone was converted to the title compound following the procedures outlined in steps C-E of Example 1, except for the following modifications: 1) in step C, the acidic hydrolysis reaction, after dilution with H2O, was extracted 2× with Et2O prior to basification, extraction 3× with EtOAc and isolation of the desired amine after concentration; 2) the prep HPLC purification of step D was omitted; and 3) in step E, the final product was purified by prep HPLC using 46% solvent B as eluant. prepared by heating the commercially available carboxylic acid in thionyl chloride and subsequent concentration) 1) in step C, the acidic hydrolysis reaction after dilution with H2O, was extracted 2× with Et2O to basification, extraction 3× with EtOAc and isolation of the desired amine after concentration 2) the prep HPLC purification of step D and 3) in step E, the final product was purified by prep HPLC