1-(3,4-dichlorophenyl)-2-phenylethanone

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

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

Procedure: Prepared following the procedure described in Intermediate 13, starting from 4-bromo-1,2-dichlorobenzene, where the crude product was purified by column chromatography (PE: EtOAc=100:1) to afford Intermediate 19 (230 mg, yield 42.4%). Prepared was purified by column chromatography (PE: EtOAc=100:1)

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

Procedure: To a solution of 1-(3,4-dichlorophenyl)-2-phenylethanone (Intermediate 19) (100 mg, 0.38 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (74.4 mg, 0.38 mmol), and urea (68.5 mg, 1.14 mmol) in 5 mL of ethanol was added 0.2 mL of concentrated HCl solution, and the mixture was refluxed for 2 days. After the solvent was removed under reduced pressure, the residue was purified by reverse-phase preparatory HPLC (26-53% acetonitrile+0.1% trifluoroacetic acid in water+0.1% trifluoroacetic acid, over 15 min.) to give Compound 47 (32 mg, yield 17.0%). 1H NMR (DMSO-d6 300 MHz) δ 10.28 (s, 1H), 8.85 (s, 1H), 7.58 (s, 1H), 7.48 (t, J=7.5 Hz, 2H), 7.41 (d, J=1.8 Hz, 1H), 7.13-7.05 (m, 5H), 6.88 (t, J=1.8 Hz, 2H), 5.25 (d, J=2.7 Hz, 1H), 4.02 (m, 2H), 1.32 (t, J=6.9 Hz, 3H); MS (ESI): m/z 499.9 [M+1]+. the mixture was refluxed for 2 days After the solvent was removed under reduced pressure the residue was purified by reverse-phase preparatory HPLC (26-53% acetonitrile+0.1% trifluoroacetic acid in water+0.1% trifluoroacetic acid, over 15 min.)

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

Procedure: A mixture of 1-(3,4-dichlorophenyl)-2-phenyl-ethan-1-one (Step 1) (12.5 g, 53.88 mmol), hydroxylamine hydrochloride (9.4 g, 135.4 mmol) and sodium acetate (268.5 mmol) in ethanol water (1:1, 250 mL) was heated at reflux for 4 hours, then was diluted with water (200 mL). The precipitate formed was filtered, dried and was recrystallized from hexane to afford 10 g (75%) of the desired product: mp 81°-82° C. 1H NMR (CDCl3) 7.50-7.06 (m, 9H), 4.18 (s, 2H). Found: Anal. Calc'd for C14H11NOCl2 : was heated at reflux for 4 hours The precipitate formed was filtered dried was recrystallized from hexane

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

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 500 ml round bottomed flask was placed 75 g of crude 3,4-dichlorophenyl benzyl carbinol and 300 ml of acetone. The reaction mixture was cooled to 0° C. and a solution of 20 g of chromic anhydride and 17.25 ml of concentrated sulfuric acid in 60 ml of water was added at a rate to keep the internal temperature below 5° C. After stirring an additional 15 minutes, the reaction was quenched with 10 ml of isopropanol and partitioned between ethyl ether and water. The organic layer was washed with brine, dried, and concentrated. The resulting crude ketone was crystallized from hexane yielding 51 g of 3,4-dichlorophenyl benzyl ketone. In a 500 ml round bottomed flask was placed the internal temperature below 5° C the reaction was quenched with 10 ml of isopropanol partitioned between ethyl ether and water The organic layer was washed with brine dried concentrated The resulting crude ketone was crystallized from hexane yielding 51 g of 3,4-dichlorophenyl benzyl ketone

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 500 ml round bottomed flask was placed 75 g of crude 3,4-dichlorophenyl benzyl carbinol and 300 ml of acetone. The reaction mixture was cooled to 0° C. and a solution of 20 g of chromic anhydride and 17.25 ml of concentrated sulfuric acid in 60 ml of water was added at a rate to keep the internal temperature below 5° C. After stirring an additional 15 minutes, the reaction was quenched with 10 ml of isopropanol and partitioned between ethyl ether and water. The organic layer was washed with brine, dried, and concentrated. The resulting crude ketone was crystallized from hexane yielding 51 g of 3,4-dichlorophenyl benzyl ketone. In a 500 ml round bottomed flask was placed the internal temperature below 5° C the reaction was quenched with 10 ml of isopropanol partitioned between ethyl ether and water The organic layer was washed with brine dried concentrated The resulting crude ketone was crystallized from hexane yielding 51 g of 3,4-dichlorophenyl benzyl ketone

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

Procedure: Prepared following the procedure described in Intermediate 13, starting from 4-bromo-1,2-dichlorobenzene, where the crude product was purified by column chromatography (PE:EtOAc=100:1) to afford Intermediate 19 (230 mg, yield 42.4%). Prepared was purified by column chromatography (PE:EtOAc=100:1)

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

Procedure: To a solution of 1-(3,4-dichlorophenyl)-2-phenylethanone (Intermediate 19) (100 mg, 0.38 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (74.4 mg, 0.38 mmol), and urea (68.5 mg, 1.14 mmol) in 5 mL of ethanol was added 0.2 mL of concentrated HCl solution, and the mixture was refluxed for 2 days. After the solvent was removed under reduced pressure, the residue was purified by reverse-phase preparatory HPLC (26-53% acetonitrile+0.1% trifluoroacetic acid in water+0.1% trifluoroacetic acid, over 15 min.) to give Compound 47 (32 mg, yield 17.0%). 1H NMR (DMSO-d6 300 MHz) δ 10.28 (s, 1H), 8.85 (s, 1H), 7.58 (s, 1H), 7.48 (t, J=7.5 Hz, 2H), 7.41 (d, J=1.8 Hz, 1H), 7.13-7.05 (m, 5H), 6.88 (t, J=1.8 Hz, 2H), 5.25 (d, J=2.7 Hz, 1H), 4.02 (m, 2H), 1.32 (t, J=6.9 Hz, 3H); MS (ESI): m/z 499.9 [M+1]+. the mixture was refluxed for 2 days After the solvent was removed under reduced pressure the residue was purified by reverse-phase preparatory HPLC (26-53% acetonitrile+0.1% trifluoroacetic acid in water+0.1% trifluoroacetic acid, over 15 min.)

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

Procedure: To a solution of 1-(3,4-dichlorophenyl)-2-phenylethanone (Intermediate 19) (100 mg, 0.38 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (74.4 mg, 0.38 mmol), and urea (68.5 mg, 1.14 mmol) in 5 mL of ethanol was added 0.2 mL of concentrated HCl solution, and the mixture was refluxed for 2 days. After the solvent was removed under reduced pressure, the residue was purified by reverse-phase preparatory HPLC (26-53% acetonitrile+0.1% trifluoroacetic acid in water+0.1% trifluoroacetic acid, over 15 min.) to give Compound 47 (32 mg, yield 17.0%). 1H NMR (DMSO-d6 300 MHz) δ 10.28 (s, 1H), 8.85 (s, 1H), 7.58 (s, 1H), 7.48 (t, J=7.5 Hz, 2H), 7.41 (d, J=1.8 Hz, 1H), 7.13-7.05 (m, 5H), 6.88 (t, J=1.8 Hz, 2H), 5.25 (d, J=2.7 Hz, 1H), 4.02 (m, 2H), 1.32 (t, J=6.9 Hz, 3H); MS (ESI): m/z 499.9 [M+1]+. the mixture was refluxed for 2 days After the solvent was removed under reduced pressure the residue was purified by reverse-phase preparatory HPLC (26-53% acetonitrile+0.1% trifluoroacetic acid in water+0.1% trifluoroacetic acid, over 15 min.)

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

Procedure: Prepared following the procedure described in Intermediate 13, starting from 4-bromo-1,2-dichlorobenzene, where the crude product was purified by column chromatography (PE: EtOAc=100:1) to afford Intermediate 19 (230 mg, yield 42.4%). Prepared was purified by column chromatography (PE: EtOAc=100:1)

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

Procedure: To a solution of 1-(3,4-dichlorophenyl)-2-phenylethanone (Intermediate 19) (100 mg, 0.38 mmol), 3-ethoxy-4-hydroxy-5-nitrobenzaldehyde (74.4 mg, 0.38 mmol), and urea (68.5 mg, 1.14 mmol) in 5 mL of ethanol was added 0.2 mL of concentrated HCl solution, and the mixture was refluxed for 2 days. After the solvent was removed under reduced pressure, the residue was purified by reverse-phase preparatory HPLC (26-53% acetonitrile+0.1% trifluoroacetic acid in water+0.1% trifluoroacetic acid, over 15 min.) to give Compound 47 (32 mg, yield 17.0%). 1H NMR (DMSO-d6 300 MHz) δ 10.28 (s, 1H), 8.85 (s, 1H), 7.58 (s, 1H), 7.48 (t, J=7.5 Hz, 2H), 7.41 (d, J=1.8 Hz, 1H), 7.13-7.05 (m, 5H), 6.88 (t, J=1.8 Hz, 2H), 5.25 (d, J=2.7 Hz, 1H), 4.02 (m, 2H), 1.32 (t, J=6.9 Hz, 3H); MS (ESI): m/z 499.9 [M+1]+. the mixture was refluxed for 2 days After the solvent was removed under reduced pressure the residue was purified by reverse-phase preparatory HPLC (26-53% acetonitrile+0.1% trifluoroacetic acid in water+0.1% trifluoroacetic acid, over 15 min.)