2-chloro-5-fluoroaniline

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

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

Procedure: This compound was synthesized in analogy to example 155 (step A to E). In step A, 2-methyl-propionaldehyde was starting material in place of cycloheptanone and ammonium acetate in place of cyclopropylamino acetate. In step B, 2-chloro-5-fluoro-phenyl amine was used in place of 4-Amino-benzoic acid ethyl ester. The pure 3-(2-chloro-5-fluoro-phenyl)-5-isopropyl-imidazolidine-2,4-dione that resulted from this procedure was then benzylated by stirring of 300 mg (1.11 mmol) of 3-(2-Chloro-5-fluoro-phenyl)-5-isopropyl-imidazolidine-2,4-dione with 141 ml (1.16 mmol) of benzyl bromide and 51 mg (1.16 ml) of sodium hydride (55% in oil) in 5 ml DMF for 3 h at RT. The reaction mixture was then taken up in ethyl acetate and was washed with 1N HCl and water. The crude product was purified by silica gel chromatography with Ethyl acetate/Heptane 1:3 to give 306 mg of pure 1-benzyl-3-(2-chloro-5-fluoro-phenyl)-5-isopropyl-imidazolidine-2,4-dione that was reduced with the same procedure described in step D and E to give pure 3-benzyl-1-(2-chloro-5-fluoro-phenyl)-4-isopropyl-imidazolidin-2-one as a colorless viscous oil MS (ESI): 347.3 (MH+). This compound was synthesized in analogy to example 155 (step A to E)

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

Procedure: This compound was synthesized in analogy to example 155 (step A to E). In step A, 2-methyl-propionaldehyde was starting material in place of cycloheptanone and ammonium acetate in place of cyclopropylamino acetate. In step B, 2-chloro-5-fluoro-phenyl amine was used in place of 4-Amino-benzoic acid ethyl ester. The pure 3-(2-chloro-5-fluoro-phenyl)-5-isopropyl-imidazolidine-2,4-dione that resulted from this procedure was then benzylated by stirring of 300 mg (1.11 mmol) of 3-(2-Chloro-5-fluoro-phenyl)-5-isopropyl-imidazolidine-2,4-dione with 141 ml (1.16 mmol) of benzyl bromide and 51 mg (1.16 ml) of sodium hydride (55% in oil) in 5 ml DMF for 3 h at RT. The reaction mixture was then taken up in ethyl acetate and was washed with 1N HCl and water. The crude product was purified by silica gel chromatography with Ethyl acetate/Heptane 1:3 to give 306 mg of pure 1-benzyl-3-(2-chloro-5-fluoro-phenyl)-5-isopropyl-imidazolidine-2,4-dione that was reduced with the same procedure described in step D and E to give pure 3-benzyl-1-(2-chloro-5-fluoro-phenyl)-4-isopropyl-imidazolidin-2-one as a colorless viscous oil MS (ESI): 347.3 (MH+). This compound was synthesized in analogy to example 155 (step A to E)

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

Procedure: 2-chloro-5-fluoroaniline (119 mg, 0.82 mmol) was reacted with 8-(1-bromoethyl)-N,N-dimethyl-2-morpholino-4-oxo-4H-chromene-6-carboxamide hydrobromide (100 mg, 0.20 mmol) using an analogous procedure to the one described in Example 3.03 to give 8-(1-(2-chloro-5-fluorophenylamino)ethyl)-N,N-dimethyl-2-morpholino-4-oxo-4H-chromene-6-carboxamide (45 mg, 47%) as a white solid. Mass Spectrum: M+H+ 474. NMR Spectrum (DMSOd6): 1.62 (d, 3H), 2.74 (bs, 3H), 2.94 (bs, 3H), 3.51-3.65 (m, 4H), 3.69-3.79 (m, 4H), 5.06-5.16 (m, 1H), 5.61 (s, 1H), 5.99 (d, 1H), 6.27 (dd, 1H), 6.40 (ddd, 1H), 7.30 (dd, 1H), 7.59 (d, 1H), 7.80 (d, 1H).

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

Procedure: 2-chloro-5-fluoroaniline (119 mg, 0.82 mmol) was reacted with 8-(1-bromoethyl)-N,N-dimethyl-2-morpholino-4-oxo-4H-chromene-6-carboxamide hydrobromide (100 mg, 0.20 mmol) using an analogous procedure to the one described in Example 3.03 to give 8-(1-(2-chloro-5-fluorophenylamino)ethyl)-N,N-dimethyl-2-morpholino-4-oxo-4H-chromene-6-carboxamide (45 mg, 47%) as a white solid. Mass Spectrum: M+H+ 474. NMR Spectrum (DMSOd6): 1.62 (d, 3H), 2.74 (bs, 3H), 2.94 (bs, 3H), 3.51-3.65 (m, 4H), 3.69-3.79 (m, 4H), 5.06-5.16 (m, 1H), 5.61 (s, 1H), 5.99 (d, 1H), 6.27 (dd, 1H), 6.40 (ddd, 1H), 7.30 (dd, 1H), 7.59 (d, 1H), 7.80 (d, 1H).

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

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

Procedure: Using ethyl 7-hydroxypyrazolo[1,5-a]pyrimidine-6-carboxylate (3.5 g, 16.9 mmol) and 2-chloro-5-fluoroaniline (2.21 g, 15.2 mmol) instead of 4-fluoro-2-methylaniline, and in the same manner as in Example 1 step 1, the title compound (4.27 g, 75%) was obtained.

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

Procedure: Using ethyl 7-hydroxypyrazolo[1,5-a]pyrimidine-6-carboxylate (3.5 g, 16.9 mmol) and 2-chloro-5-fluoroaniline (2.21 g, 15.2 mmol) instead of 4-fluoro-2-methylaniline, and in the same manner as in Example 1 step 1, the title compound (4.27 g, 75%) was obtained.

Conditions: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of ethyl 4,4,4-trifluoroacetoacetate (commercially available, 4 mL, 27.3 mmol, 1.05 eq.) in polyphosphoric acid (22 mL) was heated to 100° C. 2-chloro-5-fluoroaniline (3.78 g, 26.0 mmol, 1 eq.) was added slowly to the stirred hot solution. The resulting reaction mixture was further heated to 150° C. and then stirred at that temperature overnight (approximately 18 hours). The reaction was cooled to room temperature and water was added carefully. The resulting light brown precipitate was collected by vacuum filtration, washed with water and dissolved in ethyl acetate. The ethyl acetate solution was washed with brine, dried over anhydrous MgSO4 and concentrated on a rotary evaporator. The crude product was purified by flash chromatography on silica gel using hexane/ethyl acetate to give 3.54 g (51% yield) of the desired product as an off-white solid; MP=141-142; MS (ES) m/z (relative intensity): 266 (M+H)+ (100). The resulting reaction mixture The reaction was cooled to room temperature The resulting light brown precipitate was collected by vacuum filtration washed with water dissolved in ethyl acetate The ethyl acetate solution was washed with brine dried over anhydrous MgSO4 concentrated on a rotary evaporator The crude product was purified by flash chromatography on silica gel

Conditions: temp:140.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of (5.0 g) 2-chloro-5-fluoroaniline (commercially available, 6.0 g), glycerol (6.0 g) and m-nitrobenzene sulfonic acid sodium salt (11.0 g), was added 20 ml of 70% sulfuric acid dropwise. The reaction temperature was raised to 140° C. for 2 hr. The mixture was then cooled, poured on ice water and filtered through celite. The filtrate was neutralized with NaOH and extracted with CH2Cl2. The combined organic layers were dried over anhydrous MgSO4 and concentrated on a rotary evaporator. The crude product was purified by flash chromatography on silica gel using 100% CH2Cl2 to give 3.7 g of the desired product of a yellow solid; MP=74-76° C.; MS (ES) m/z (relative intensity): 182 (M+H)+ (100). The mixture was then cooled poured on ice water filtered through celite extracted with CH2Cl2 The combined organic layers were dried over anhydrous MgSO4 concentrated on a rotary evaporator The crude product was purified by flash chromatography on silica gel using 100% CH2Cl2

Conditions: temp:140.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of (5.0 g) 2-chloro-5-fluoroaniline (commercially available, 6.0 g), glycerol (6.0 g) and m-nitrobenzene sulfonic acid sodium salt (11.0 g), was added 20 ml of 70% sulfuric acid dropwise. The reaction temperature was raised to 140° C. for 2 hr. The mixture was then cooled, poured on ice water and filtered through celite. The filtrate was neutralized with NaOH and extracted with CH2Cl2. The combined organic layers were dried over anhydrous MgSO4 and concentrated on a rotary evaporator. The crude product was purified by flash chromatography on silica gel using 100% CH2Cl2 to give 3.7 g of the desired product of a yellow solid; MP=74-76° C.; MS (ES) m/z (relative intensity): 182 (M+H)+ (100). The mixture was then cooled poured on ice water filtered through celite extracted with CH2Cl2 The combined organic layers were dried over anhydrous MgSO4 concentrated on a rotary evaporator The crude product was purified by flash chromatography on silica gel using 100% CH2Cl2

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

Procedure: Nitrosonium tetrafluoroborate (802 mg, 6.87 mmol) was added to a solution of 2-chloro-5-fluoroaniline (1.00 g, 6.87 mmol) in acetonitrile (50 mL) at 0° C. The resulting mixture was stirred for 1 h, then diluted with ethyl ether (150 mL). The precipitate was filtered and air-dried to give 2-chloro-5-fluorobenzenediazonium tetrafluoroborate (1-1) as an off-white solid. 1H NMR (300 MHz, CD3OD) δ 8.66 (ddd, 1H, J=6.7, 2.1, 1.0 Hz), 8.16 (m1, 2H). The precipitate was filtered air-dried