3-fluoro-N-methylaniline

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: 5-Chloro-3-(4-chloro-3-(trifluoromethyl)phenylsulfonamido)picolinic acid (50 mg, 0.12 mmol), (3-fluoro-phenyl)-methyl-amine (45 mg, 0.36 mmol), BOP (69 mg, 0.36 mmol), DIEA (130 μL, 0.72 mmol) were reacted according to the procedure D to provide the title compound. HPLC purification (20→90% gradient of MeCN-water) provided 5-chloro-3-(4-chloro-3-trifluoromethyl-benzenesulfonylamino)-pyridine-2-carboxylic acid (3-fluoro-phenyl)-methyl-amide: MS m/z: (M+H) 521.9.

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

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

Procedure: N-methyl-N-m-chlorobenzyl-m-fluoroaniline was prepared from 17.5 grams (0.14 mole) of N-methyl-m-fluoroaniline, 23. grams (0.14 mole) m-chlorobenzyl chloride (Aldrich), 11.9 grams anhydrous sodium acetate and 0.12 grams iodine according to the procedure described in Example III. Yield 28.6 grams (83.7 percent), boiling point 172° C. at 0.07 mmHg.

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

Procedure: N-methyl-N-p-fluorobenzyl-m-fluoroaniline was prepared from 26.3 grams (0.21 mole) of N-methyl-m-fluoroaniline, 30.6 grams (0.21 mole) p-fluorobenzyl chloride (Aldrich), 17.8 grams anhydrous sodium acetate and 0.18 grams iodine according to the procedure described in Example III. Yield 35.4 grams (72 percent), boiling point 131°-137° C. at 0.2 mmHg.

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

Procedure: N-methyl-N-p-chlorobenzyl-m-fluoroaniline was prepared from 17.5 grams (0.14 mole) of N-methyl-m-fluoroaniline, 23.7 grams (0.14 mole) p-chlorobenzyl chloride (Aldrich), 11.9 grams anhydrous sodium acetate and 0.12 grams iodine according to the procedure as described in Example III. Yield 25.8 grams (74 percent), boiling point 162°-170° C. at 0.13 mmHg.

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

Procedure: 1-((3-Fluoroanilino)methyl)-1H-benzotriazole (173.9 g) was slurried in dry tetrahydrofuran. Sodium borohydride (32.5 g) was added portionwise to the mixture at room temperature. After addition was complete, the mixture was heated at reflux for 4 hours. The solution was cooled and poured slowly into 400 mL of 5 M hydrochloric acid with ice and stirred for 1 hour at room temperature. The solution pH was adjusted to 9-10 using 10 M sodium hydroxide solution. The product was extracted using diethyl ether. The ether extracts were washed successively with 1 M sodium hydroxide solution, saturated sodium chloride solution, and water. The organic phase was dried over sodium sulfate and evaporated under reduced pressure to yield 87.5 g (97%) of 3-fluoro-N-methylaniline as a colorless oil. [NMR (200 MHz, DMSO-d6): δ 2.76 (s, 3H); 3.41 (br s, 1H); 6.59-6.92 (m, 3H); 7.27 (q, J=8.0 Hz, 1H)]. After addition the mixture was heated at reflux for 4 hours The solution was cooled The product was extracted The ether extracts were washed successively with 1 M sodium hydroxide solution, saturated sodium chloride solution, and water The organic phase was dried over sodium sulfate evaporated under reduced pressure

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

Procedure: 3-Fluoro-N-methylaniline was prepared from 3-fluoroaniline using a modified reductive amination. First, 1-hydroxymethylbenzotriazole was prepared by adding 37% aqueous formaldehyde to benzotriazole at 40° C. in a 1:1 ratio and cooling to room temperature to precipitate the product. After filtration the hydroxymethylbenzotriazole (125 g) was heated to reflux in toluene with 3-fluoroaniline (92.2 g). Water was removed azeotropically using a Dean-Stark trap. After three hours, the mixture was cooled to room temperature, then refrigerated for several hours to complete precipitation. The white crystalline solid was collected by filtration, yielding 174.2 g (86.6%) of 1-((3-fluoroanilino)methyl)-1H-benzotriazole. to precipitate the product After filtration the hydroxymethylbenzotriazole (125 g) was heated to reflux in toluene with 3-fluoroaniline (92.2 g) Water was removed azeotropically the mixture was cooled to room temperature refrigerated for several hours precipitation The white crystalline solid was collected by filtration