2-chloro-3-fluoro-4-methoxybenzaldehyde

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

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

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

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

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

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

Procedure: To 1.6 g (9 mmol) 5-amino-7-fluoro-1H-quinolin-2-one and 1.69 g (9 mmol) 2-chloro-3-fluoro-4-methoxybenzaldehyde in 27 ml toluene and 8 ml 1,4-dioxane are added 1.96 ml acetic acid and 7 ml tetrabutyl orthotitanate. The mixture is heated over 20 hours to 110° C., cooled to room temperature and poured into aqueous ammonium fluoride solution. Ethyl acetate is added and the mixture is stirred vigorously for 1 hour. Phases are separated and addition of ethylacetate is repeated two times while stirring is done under reflux and phases are separated while they are still hot. The combined organic phases are concentrated and the residue is purified by flash chromatography on silica gel (ethyl acetate, then methanol in dichloromethane 15% to 20%) to yield 2.17 g of 5-{[1-(2chloro-3-fluoro-4-methoxyphenyl)methylidene]-amino}-7-fluoro-1H-quinolin-2-one. 465 mg NaH (55% in mineral oil, 9.7 mmol) were washed with dry THF and suspended together with 2.6 g (7.5 mmol) of 5-{[1-(2-chloro-3-fluoro-4-methoxyphenyl)methylidene]amino}-7-fluoro-1H-quinolin-2-one in 90 ml THF. t-Butyldimethylsilyl chloride is added as solid and the mixture is stirred for 3.5 hours while it becomes a clear solution. In parallel 0.96 ml 1,1,1-trifluoro-2,3-epoxypropane in 24 ml THF and 7 ml hexane are cooled to −100° C. and 4.5 ml of a 2.5 M n-butyl lithium solution in hexane are added over 10 minutes while the temperature does not exceed −95° C. 10 Minutes after complete addition the previously prepared 1-{t-butyldimethylsilyl}-5-{[1-(2-chloro-3-fluoro-4-methoxyphenyl)methylidene]amino}-7-fluoroquinolin-2-one solution in THF is added over 30 minutes while the temperature does not exceed −95° C. After 3 hours at −100° C. 7.5 ml diethyl ether are added and the reaction mixture is warmed to room temperature over one hour. The reaction is quenched by addition of saturated ammonium chloride solution. After stirring for 30 minutes the phases are separated and the aqueous layer is extracted with dichloromethan, the combined organic phases are washed with brine, dried over sodium sulphate and then evaporated. Flash chromatography on silica gel (ethyl acetate in hexane 50 to 100%) yields 2.14 g of 5-{[(2-chloro-3-fluoro-4-methoxyphenyl)(2-trifluoromethyloxiranyl)methyl]amino}-7-fluoro-1H-quinolin-2-one which is used for some of the following examples for opening of the oxirane ring with different nucleophiles. The mixture is heated over 20 hours to 110° C. Phases are separated addition of ethylacetate while stirring under reflux phases are separated while they The combined organic phases are concentrated the residue is purified by flash chromatography on silica gel (ethyl acetate

Conditions: temp:-70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1 g (6.2 mmol) 3-Chloro-2-fluoroanisole in 20 ml THF are cooled to −70° C. and 2.7 ml of a 2.5 M n-butyl lithium solution in hexane are added. After one hour at −70° 3.93 ml DMF in 7 ml THF are added at −70° C. and the mixture is stirred another hour at −70° C. 15 ml of a 1 M aqueous HCl are added and the reaction is warmed to ambient temperature over 18 hours. The reaction mixture is partitioned between diethyl ether and water. The aqueous phase is extracted with diethyl ether, the combined organic phases are washed with brine, dried over sodium sulfate and evaporated. The crude product is purified by chromatography on silica gel to yield 0.25 g 2-chloro-3-fluoro-4-methoxybenzaldehyde. 1H-NMR (CDCl3); δ=3.98 (s, 3H), 6.98 (dd, 1H), 7.75 (dd, 1H), 10.30 (s, 1H). the reaction is warmed to ambient temperature over 18 hours The reaction mixture is partitioned between diethyl ether and water The aqueous phase is extracted with diethyl ether the combined organic phases are washed with brine dried over sodium sulfate evaporated The crude product is purified by chromatography on silica gel

Conditions: temp:-70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1 g (6.2 mmol) 3-Chloro-2-fluoroanisole in 20 ml THF are cooled to −70° C. and 2.7 ml of a 2.5 M n-butyl lithium solution in hexane are added. After one hour at −70° 3.93 ml DMF in 7 ml THF are added at −70° C. and the mixture is stirred another hour at −70° C. 15 ml of a 1 M aqueous HCl are added and the reaction is warmed to ambient temperature over 18 hours. The reaction mixture is partitioned between diethyl ether and water. The aqueous phase is extracted with diethyl ether, the combined organic phases are washed with brine, dried over sodium sulfate and evaporated. The crude product is purified by chromatography on silica gel to yield 0.25 g 2-chloro-3-fluoro-4-methoxybenzaldehyde. Analogously to example 9, the corresponding imine is produced starting from 411 mg (2.6 mmol) 5-amino-2-methylquinolin and 490 mg (2.6 mmol) 2-chloro-3-fluoro-4-methoxybenzaldehyde in toluene. 800 mg (2.4 mmol) [(2-chloro-3-fluoro-4-methoxyphenyl)methylene]-2-methylquinolin-5-amine in THF are added to 0.42 ml (4.8 mmol) of the lithiated 1,1,1-trifluoroepoxypropane at −100° C. analogously to example 9. Typical work up and chromatographic purification on silica gel (acetone in hexane 0% to 50° A)) yield 796 mg and 100 mg of two diastereomers of {[2-chloro-3-fluoro-4-methoxyphenyl][2-(trifluoromethyl)oxiranyl]methyl}-2-methylquinolin-5-amine. the reaction is warmed to ambient temperature over 18 hours The reaction mixture is partitioned between diethyl ether and water The aqueous phase is extracted with diethyl ether the combined organic phases are washed with brine dried over sodium sulfate evaporated The crude product is purified by chromatography on silica gel

Conditions: temp:-70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1 g (6.2 mmol) 3-Chloro-2-fluoroanisole in 20 ml THF are cooled to −70° C. and 2.7 ml of a 2.5 M n-butyl lithium solution in hexane are added. After one hour at −70° 3.93 ml DMF in 7 ml THF are added at −70° C. and the mixture is stirred another hour at −70° C. 15 ml of a 1 M aqueous HCl are added and the reaction is warmed to ambient temperature over 18 hours. The reaction mixture is partitioned between diethyl ether and water. The aqueous phase is extracted with diethyl ether, the combined organic phases are washed with brine, dried over sodium sulfate and evaporated. The crude product is purified by chromatography on silica gel to yield 0.25 g 2-chloro-3-fluoro-4-methoxybenzaldehyde. Analogously to example 9, the corresponding imine is produced starting from 411 mg (2.6 mmol) 5-amino-2-methylquinolin and 490 mg (2.6 mmol) 2-chloro-3-fluoro-4-methoxybenzaldehyde in toluene. 800 mg (2.4 mmol) [(2-chloro-3-fluoro-4-methoxyphenyl)methylene]-2-methylquinolin-5-amine in THF are added to 0.42 ml (4.8 mmol) of the lithiated 1,1,1-trifluoroepoxypropane at −100° C. analogously to example 9. Typical work up and chromatographic purification on silica gel (acetone in hexane 0% to 50%) yield 796 mg and 100 mg of two diastereomers of {[2-chloro-3-fluoro-4-methoxyphenyl][2-(trifluoromethyl)oxiranyl]methyl}-2-methylquinolin-5-amine. the reaction is warmed to ambient temperature over 18 hours The reaction mixture is partitioned between diethyl ether and water The aqueous phase is extracted with diethyl ether the combined organic phases are washed with brine dried over sodium sulfate evaporated The crude product is purified by chromatography on silica gel

Conditions: temp:-70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1 g (6.2 mmol) 3-Chloro-2-fluoroanisole in 20 ml THF are cooled to −70° C. and 2.7 ml of a 2.5 M n-butyl lithium solution in hexane are added. After one hour at −70° 3.93 ml DMF in 7 ml THF are added at −70° C. and the mixture is stirred another hour at −70° C. 15 ml of a 1 M aqueous HCl are added and the reaction is warmed to ambient temperature over 18 hours. The reaction mixture is partitioned between diethyl ether and water. The aqueous phase is extracted with diethyl ether, the combined organic phases are washed with brine, dried over sodium sulfate and evaporated. The crude product is purified by chromatography on silica gel to yield 0.25 g 2-chloro-3-fluoro-4-methoxybenzaldehyde. Analogously to example 9, the corresponding imine is produced starting from 411 mg (2.6 mmol) 5-amino-2-methylquinolin and 490 mg (2.6 mmol) 2-chloro-3-fluoro-4-methoxybenzaldehyde in toluene. 800 mg (2.4 mmol) [(2-chloro-3-fluoro-4-methoxyphenyl)methylene]-2-methylquinolin-5-amine in THF are added to 0.42 ml (4.8 mmol) of the lithiated 1,1,1-trifluoroepoxypropane at −100° C. analogously to example 9. Typical work up and chromatographic purification on silica gel (acetone in hexane 0% to 50%) yield 796 mg and 100 mg of two diastereomers of {[2-chloro-3-fluoro-4-methoxyphenyl][2-(trifluoromethyl)oxiranyl]methyl}-2-methylquinolin-5-amine. the reaction is warmed to ambient temperature over 18 hours The reaction mixture is partitioned between diethyl ether and water The aqueous phase is extracted with diethyl ether the combined organic phases are washed with brine dried over sodium sulfate evaporated The crude product is purified by chromatography on silica gel

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

Procedure: To 1.6 g (9 mmol) 5-amino-7-fluoro-1H-quinolin-2-one and 1.69 g (9 mmol) 2-chloro-3-fluoro-4-methoxybenzaldehyde in 27 ml toluene and 8 ml 1,4-dioxane are added 1.96 ml acetic acid and 7 ml tetrabutyl orthotitanate. The mixture is heated over 20 hours to 110° C., cooled to room temperature and poured into aqueous ammonium fluoride solution. Ethyl acetate is added and the mixture is stirred vigorously for 1 hour. Phases are separated and addition of ethylacetate is repeated two times while stirring is done under reflux and phases are separated while they are still hot. The combined organic phases are concentrated and the residue is purified by flash chromatography on silica gel (ethyl acetate, then methanol in dichloromethane 15% to 20%) to yield 2.17 g of 5-{[1-(2-chloro-3-fluoro-4-methoxyphenyl)methylidene]-amino}-7-fluoro-1H-quinolin-2-one. 465 mg NaH (55% in mineraloil, 9.7 mmol) were washed with dry THF and suspended together with 2.6 g (7.5 mmol) of 5-{[1-(2-chloro-3-fluoro-4-methoxyphenyl)methylidene]amino}-7-fluoro-1H-quinolin-2-one in 90 ml THF. t-Butyldimethylsilyl chloride is added as solid and the mixture is stirred for 3.5 hours while it becomes a clear solution. In parallel 0.96 ml 1,1,1-trifluoro-2,3-epoxypropane in 24 ml THF and 7 ml hexane are cooled to −100° C. and 4.5 ml of a 2.5 M n-butyl lithium solution in hexane are added over 10 minutes while the temperature does not exceed −95° C. 10 Minutes after complete addition the previously prepared 1-{t-butyldimethylsilyl}-5-{[1-(2-chloro-3-fluoro-4-methoxyphenyl)methylidene]amino}-7-fluoroquinolin-2-one solution in THF is added over 30 minutes while the temperature does not exceed −95° C. After 3 hours at −100° C. 7.5 ml diethyl ether are added and the reaction mixture is warmed to room temperature over one hour. The reaction is quenched by addition of saturated ammonium chloride solution. After stirring for 30 minutes the phases are separated and the aqueous layer is extracted with dichloromethan, the combined organic phases are washed with brine, dried over sodium sulphate and then evaporated. Flash chromatography on silica gel (ethyl acetate in hexane 50 to 100%) yields 2.14 g of 5-{[(2-chloro-3-fluoro-4-methoxyphenyl)(2-trifluoromethyloxiranyl)methyl]amino}-7-fluoro-1H-quinolin-2-one which is used for some of the following examples for opening of the oxirane ring with different nucleophiles. The mixture is heated over 20 hours to 110° C. Phases are separated addition of ethylacetate while stirring under reflux phases are separated while they The combined organic phases are concentrated the residue is purified by flash chromatography on silica gel (ethyl acetate

Conditions: temp:-70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1 g (6.2 mmol) 3-Chloro-2-fluoroanisole in 20 ml THF are cooled to −70° C. and 2.7 ml of a 2.5 M n-butyl lithium solution in hexane are added. After one hour at −70° 3.93 ml DMF in 7 ml THF are added at −70° C. and the mixture is stirred another hour at −70° C. 15 ml of a 1M aqueous HCl are added and the reaction is warmed to ambient temperature over 18 hours. The reaction mixture is partitioned between diethyl ether and water. The aqueous phase is extracted with diethyl ether, the combined organic phases are washed with brine, dried over sodium sulfate and evaporated. The crude product is purified by chromatography on silica gel to yield 0.25 g 2-chloro-3-fluoro-4-methoxybenzaldehyde. 1H-NMR (CDCl3); δ=3.98 (s, 3H), 6.98 (dd, 1H), 7.75 (dd, 1H), 10.30 (s, 1H). the reaction is warmed to ambient temperature over 18 hours The reaction mixture is partitioned between diethyl ether and water The aqueous phase is extracted with diethyl ether the combined organic phases are washed with brine dried over sodium sulfate evaporated The crude product is purified by chromatography on silica gel