3-bromo-2,6-dimethylaniline

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

Procedure: To a solution of 3-bromo-2,6-dimethylphenylamine (0.27 g, 1.35 mmol) dissolved in toluene (5.4 mL) and pyrrolidine (0.56 mL, 6.8 mmol) was added sodium t-butoxide (0.39 g, 4.0 mmol). The suspension was deoxygenated for approximately 10 minutes by passing a stream of nitrogen through the solvent. Solid tris(dibenzilideneacetone)dipalladium(0) (10 mg) and rac-2,2′Bis(diphenylphosphino)-1,1′binaphthyl (25 mg) were combined and added in one portion. Nitrogen bubbling continued for an additional 2 minutes before heat was applied (100° C. overnight). The reaction mixture was cooled to room temperature and diluted with ethyl acetate and HClaq (2N). The aqueous layer was adjusted basic with sodium bicarbonate solution and re-extracted with ethyl acetate. The organic layer was dried over sodium sulfate, decanted and concentrated under reduced pressure to give to give the desired 2,6-dimethyl-3-pyrrolidin-1-ylphenylamine as an amber oil. The suspension was deoxygenated for approximately 10 minutes added in one portion before heat (100° C. overnight) diluted with ethyl acetate and HClaq (2N) re-extracted with ethyl acetate The organic layer was dried over sodium sulfate decanted concentrated under reduced pressure to give

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of crude 1-bromo-2,4-dimethyl-3-nitrobenzene (0.58 g, 2.9 mmol) in glacial acetic acid (12 mL) was added iron powder (0.65 g, 11.6 mmol). The mixture was stirred rapidly at 80° C. under nitrogen for 2 hours. Upon completion, the mixture was cooled, diluted with diethyl ether and extracted with aqueous sodium hydroxide solution (2N). The organic layer was dried over sodium sulfate, decanted and concentrated under reduced pressure to give 3-bromo-2,6-dimethylphenylamine as a yellow oil which was used without further purification. Upon completion, the mixture was cooled extracted with aqueous sodium hydroxide solution (2N) The organic layer was dried over sodium sulfate decanted concentrated under reduced pressure

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

Procedure: It is known that 4-bromo-2,6-dialkylanilines are predominantly formed by brominating 2,6-dialkylanilines. The high reactivity of these compounds causes the reaction to proceed non-selectively with the formation of different by-products, depending on the reaction conditions. Thus, for example, the bromination of 2,6-dimethylaniline in the presence of glacial acetic acid gives 4-bromo-2,6-dimethylaniline in a yield of 80-85% of theory (Chem. Ber. (1901), 34, 2242). The bromination of 2,6-dimethylaniline in strongly acid medium always results in the formation of substantial amounts of 3-bromo-2,6-dimethylaniline (Chem. Ber. (1900), 33, 1967). It is further known from published UK patent application A 2 098 210 that, in the halogenation of N-alkyl-2,6-dialkylanilines in the presence of a Lewis acid such as AlCl3, the halogen is even introduced selectively in 3-position. are predominantly formed the reaction depending on the reaction conditions

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

Procedure: To a solution of 3-bromo-2,6-dimethylphenylamine(0.27 g, 1.35 mmol) dissolved in toluene (5.4 mL) and pyrrolidine (0.56 mL, 6.8 mmol) was added sodium t-butoxide (0.39 g, 4.0 mmol). The suspension was deoxygenated for approximately 10 minutes by passing a stream of nitrogen through the solvent. Solid tris(dibenzilideneacetone)dipalladium(0) (10 mg) and rac-2,2′Bis(diphenylphosphino)-1,1′binaphthyl (25 mg) were combined and added in one portion. Nitrogen bubbling continued for an additional 2 minutes before heat was applied (100° C. overnight). The reaction mixture was cooled to room temperature and diluted with ethyl acetate and HClaq. (2N). The aqueous layer was adjusted basic with sodium bicarbonate solution and re-extracted with ethyl acetate. The organic layer was dried over sodium sulfate, decanted and concentrated under reduced pressure to give to give the desired 2,6-dimethyl-3-pyrrolidin-1-ylphenylamine as an amber oil. The suspension was deoxygenated for approximately 10 minutes added in one portion before heat (100° C. overnight) diluted with ethyl acetate and HClaq re-extracted with ethyl acetate The organic layer was dried over sodium sulfate decanted concentrated under reduced pressure to give

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of crude 1-bromo-2,4-dimethyl-3-nitrobenzene (0.58 g, 2.9 mmol) in glacial acetic acid (12 mL) was added iron powder (0.65 g, 11.6 mmol). The mixture was stirred rapidly at 80° C. under nitrogen for 2 hours. Upon completion, the mixture was cooled, diluted with diethyl ether and extracted with aqueous sodium hydroxide solution (2N). The organic layer was dried over sodium sulfate, decanted and concentrated under reduced pressure to give 3-bromo-2,6-dimethylphenylamine as a yellow oil which was used without further purification. Upon completion, the mixture was cooled extracted with aqueous sodium hydroxide solution (2N) The organic layer was dried over sodium sulfate decanted concentrated under reduced pressure