1-(2-anilino-4-chlorophenyl)propan-1-one

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

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

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 1-(4-chloro-2-phenylamino-phenyl)-propan-1-one (13.0 g, 50.2 mmol) in toluene (150 mL) at 25° C. was treated with methyl chlorooxoacetate (42.86 g, 350 mmol). The reaction mixture was then heated at 110° C. for 16 hr. At this time, the reaction mixture was concentrated in vacuo to afford N-(5-chloro-2-propionyl-phenyl)-N-phenyl-oxalamic acid methyl ester (15.2 g, 87.6%). The material was used without further purification. At this time, the reaction mixture was concentrated in vacuo

Conditions: temp:115.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of THF (60 mL) and DMF (7.5 mL) at 0° C. under nitrogen was added oxalyl chloride (6.5 mL, 76.8 mmol) during which time a white precipitate formed. The temperature was slowly raised to room temp. and stirred for 1.5 hr. THF was distilled off from the reaction mixture under reduced pressure and under nitrogen. The gummy residue was further diluted with DMF (100 mL). A solution of 1-(4-chloro-2-phenylamino-phenyl)-propan-1-one (5.0 g, 19.30 mmol) in DMF (50 mL) was added to the reaction mixture at room temperature. The reaction was heated at 115° C. for 2 hr. The reaction mixture was brought down to room temperature, then diluted with water (750 mL), and the mixture was extracted with ethyl acetate (2×750 mL). The combined organic layers were washed with brine (500 mL), dried, and concentrated under reduced pressure to yield 7-chloro-3-methyl-1-phenyl-1H-quinolin-4-one (4.25 g, 81.6%) as an off-white solid. 1H NMR (DMSO-d6) δ ppm 8.24 (d, J=8.8 Hz, 1H) 8.01 (s, 1H) 7.52-7.80 (m, 5H) 7.40 (dd, J=8.8, 1.8 Hz, 1H) 6.87 (d, J=1.8 Hz, 1H) 2.01 (s, 3H). MS calcd. for C16H12ClNO [(M+H)+] 270.0, obsd. 269.8. formed The temperature was slowly raised to room temp. THF was distilled off from the reaction mixture under reduced pressure and under nitrogen The gummy residue was further diluted with DMF (100 mL) was brought down to room temperature the mixture was extracted with ethyl acetate (2×750 mL) The combined organic layers were washed with brine (500 mL) dried concentrated under reduced pressure

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 1-(4-chloro-2-phenylamino-phenyl)-propan-1-one (13.0 g, 50.2 mmol) in toluene (150 mL) was added methyl chlorooxoacetate (42.86 g, 350.0 mmol) at room temperature under nitrogen. The reaction mixture was heated at reflux at 110° C. for 16 hr. Completion of the reaction was monitored by silica TLC (mobile phase; hexane:ethyl acetate=1:1; Rf=0.5). The reaction mixture was concentrated under vacuum to afford 15.2 g (87.6% crude yield) of N-(5-chloro-2-propionyl-phenyl)-N-phenyl-oxalamic acid methyl ester. The crude product was used in the next step without further purification. The reaction mixture was heated The reaction mixture was concentrated under vacuum

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

Procedure: In a 25 mL round-bottomed flask, 1-(4-chloro-2-phenylamino-phenyl)-propan-1-one (522 mg, 2.01 mmol) was combined with THF (4 mL) to give a yellow solution. Sodium bis(trimethylsilyl)amide (1.0 M in THF) (5.02 mL, 5.02 mmol) was added slowly dropwise, resulting in a dark red solution. A mixture of oxazole-2-carbonyl chloride (344 mg, 2.61 mmol) in THF (8 mL) and 8 drops of DMF were added to the reaction mixture. The resulting mixture was stirred at room temperature for 5 hr. The reaction mixture was quenched by the addition of water and the aqueous layer was extracted with ethyl acetate. The organic phase was dried (MgSO4), filtered, then concentrated to afford a yellow oil. The crude material was purified by flash chromatography (silica gel, 80 g, 25-65% ethyl acetate in hexanes) to give 7-chloro-3-methyl-2-oxazol-2-yl-1-phenyl-1H-quinolin-4-one (160 mg, 23.6%) as a yellowish solid. MS calcd. for C19H13ClN2O2 [(M+H)+] 337, obsd. 337. to give a yellow solution resulting in a dark red solution were added to the reaction mixture The reaction mixture was quenched by the addition of water the aqueous layer was extracted with ethyl acetate The organic phase was dried (MgSO4) filtered concentrated to afford a yellow oil The crude material was purified by flash chromatography (silica gel, 80 g, 25-65% ethyl acetate in hexanes)

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

Procedure: To a solution of 4-chloro-N-methoxy-N-methyl-2-phenylamino-benzamide (5.0 g, 17.2 mmol) in THF (60 mL) was added ethylmagnesium bromide (1M solution in THF, 70 mL, 70 mmol) dropwise at 0° C. under nitrogen. The mixture was slowly warmed to room temperature and stirred for 2 hr. Completion of the reaction was monitored by silica TLC (mobile phase; hexane:ethyl acetate=4:1; Rf=0.5). Reaction was quenched with an aqueous solution of 1N HCl (50 mL) at 0° C. and was extracted with ethyl acetate (2×300 mL). The combined organic layers were washed with water (100 mL), brine (100 mL), dried over anhydrous Na2SO4, and concentrated under reduced pressure. The crude material was purified using silica gel (100-200 mesh) column chromatography, using gradient polarity mobile phase (ethyl acetate:hexane=1:91:4), to give 1-(4-chloro-2-phenylamino-phenyl)-propan-1-one (4.15 g, 92.9% yield) as a yellow oil. 1H NMR (DMSO-d6) δ ppm 10.53 (s, 1H) 8.00 (d, J=8.7 Hz, 1H) 7.34-7.51 (m, 2H) 7.28 (d, J=7.7 Hz, 2H) 7.13-7.23 (m, 1H) 7.07 (d, J=1.8 Hz, 1H) 6.82 (dd, J=8.6, 1.9 Hz, 1H) 3.07 (q, J=7.2 Hz, 2H) 1.09 (t, J=7.3 Hz, 3H). Reaction was quenched with an aqueous solution of 1N HCl (50 mL) at 0° C. was extracted with ethyl acetate (2×300 mL) The combined organic layers were washed with water (100 mL), brine (100 mL) dried over anhydrous Na2SO4 concentrated under reduced pressure The crude material was purified

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 1-(4-chloro-2-phenylamino-phenyl)-propan-1-one (13.0 g, 50.2 mmol) in toluene (150 mL) at 25° C. was treated with methyl chlorooxoacetate (42.86 g, 350 mmol). The reaction mixture was then heated at 110° C. for 16 h. At this time, the reaction mixture was concentrated in vacuo to afford N-(5-chloro-2-propionyl-phenyl)-N-phenyl-oxalamic acid methyl ester (15.2 g, 87.6%). The material was used without further purification. At this time, the reaction mixture was concentrated in vacuo

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 4-chloro-N-methoxy-N-methyl-2-phenylamino-benzamide (5.0 g, 17.2 mmol) in tetrahydrofuran (60 mL) was treated dropwise with ethylmagnesium bromide (1M solution in tetrahydrofuran, 70 mL, 70 mmol). Upon completion of addition, the mixture was allowed to slowly warm to 25° C. where it was stirred for 2 h. At this time, the reaction was cooled to 0° C., was quenched with a 1N aqueous hydrochloric acid solution (50 mL) and was then extracted with ethyl acetate (2×300 mL). The combined organics were washed with water (100 mL) and a saturated aqueous sodium chloride solution (100 mL), dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Flash chromatography (silica gel; 100-200 mesh, ethyl acetate/hexanes 10-25%) afforded 1-(4-chloro-2-phenylamino-phenyl)-propan-1-one (4.15 g, 92.9%) as a yellow oil. 1H NMR (DMSO-d6) δ ppm 10.53 (s, 1H), 8.00 (d, J=8.7 Hz, 1H), 7.34-7.51 (m, 2H), 7.28 (d, J=7.7 Hz, 2H), 7.13-7.23 (m, 1H), 7.07 (d, J=1.8 Hz, 1H), 6.82 (dd, J=8.6, 1.9 Hz, 1H), 3.07 (q, J=7.2 Hz, 2H), 1.09 (t, J=7.3 Hz, 3H). Upon completion of addition At this time, the reaction was cooled to 0° C. was quenched with a 1N aqueous hydrochloric acid solution (50 mL) was then extracted with ethyl acetate (2×300 mL) The combined organics were washed with water (100 mL) a saturated aqueous sodium chloride solution (100 mL), dried over anhydrous sodium sulfate filtered concentrated in vacuo