3-bromo-2-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:

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 a solution of 3-bromo-2-methyl aniline (0104) (0.50 g, 2.69 mmol) in chloroform (5 mL) was added potassium acetate (0.28 g, 2.82 mmol). The mixture was cooled with ice-water bath and then acetic anhydride (0.50 mL, 5.37 mmol) was added to it. Ice-water bath was then removed and the resulting mixture was stirred at room temperature for 10 minutes after which time a white gelatinous solid formed. 18-Crown-6 (0.14 g, 0.54 mmol) was then added followed by isoamyl nitrite (0.80 mL, 5.90 mmol). The mixture was then heated under reflux for 18 hours. The reaction mixture was allowed to cool, and was partitioned between chloroform (3×10 mL) and saturated aqueous sodium hydrogen carbonate (10 mL). The combined organic extracts were washed with brine (10 mL), dried over Na2SO4, filtered and evaporated to give a crude product which was purified by column chromatography (ethyl acetate in petroleum ether, 10% v/v) to give 1-(4-bromoindrazol-1-y1)-ethanone (0105) as an orange solid (0.31 g, 49%), and 4-bromo-1H-indazole (0106-3) as a pale orange solid (0.21 g, 40%). Compound 0105: LCMS: 239 [M+1]+; 1H NMR (400 Hz, CDCl3) δ 2.80 (s, 3H), 7.41 (t, J=6.8 Hz, 1H), 7.50 (d, J=6.0 Hz, 1H), 8.15 (s, 1H), 8.40 (d, J=6.8 Hz, 1H). Compound 0106: LCMS: 197 [M+1]+; 1H NMR (400 Hz, CDCl3) δ 7.25 (t, J=6.0 Hz, 1H), 7.34 (d, J=6.4 Hz, 1H), 7.46 (d, J=6.8 Hz, 1H), 8.12 (s, 1H). The mixture was cooled with ice-water bath Ice-water bath was then removed formed The mixture was then heated under reflux for 18 hours to cool was partitioned between chloroform (3×10 mL) and saturated aqueous sodium hydrogen carbonate (10 mL) The combined organic extracts were washed with brine (10 mL) dried over Na2SO4 filtered evaporated to give a crude product which was purified by column chromatography (ethyl acetate in petroleum ether, 10% v/v)

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

Procedure: 3-Bromo-2-methylaniline (800 mg) and diisopropylethylamine (1667 mg) were added to dichloromethane (12 mL). 1-Adamantanecarbonyl chloride (940 mg) was added and the solution was stirred at room temperature for 16 hours. The solution was diluted with 50% ethyl acetate (hexanes), washed three times with 1 M aqueous HCl, washed with brine, dried over anhydrous sodium sulfate, and filtered. The solvent volume was partially reduced under vacuum, and the solid material precipitated out of solution, which was isolated by filtration to provide the title compound. washed three times with 1 M aqueous HCl washed with brine dried over anhydrous sodium sulfate filtered the solid material precipitated out of solution which was isolated by filtration