4-Chloro-2-(trifluoromethoxy)aniline

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 4-chloro-2-(trifluoromethoxy)aniline (1.0 g, 4.7 mmol) in EtOH (50 mL) at 50° C. was added a slurry of iodine (1.2 g, 9.6 mmol) and silver sulfate (2.6 g, 8.4 mmol) in EtOH (30 mL). The reaction mixture was stirred in darkness at 50° C. for 24 h, then cooled to r.t. and filtered through Celite®. The filtrate was concentrated in vacuo. Purification by column chromatography (SiO2, 0-55% ethyl acetate/hexanes) gave the title compound (1.6 g, quantitative) as a pale brown solid. δH (CDCl3) 7.59 (1H, d, J 1.7 Hz), 7.18 (1H, d, J 1.7 Hz), 4.35 (2H, br. s). LCMS (ES+) 337.8 (M+H)+, RT 3.81 minutes (Method 5). cooled to r.t. filtered through Celite® The filtrate was concentrated in vacuo Purification by column chromatography (SiO2, 0-55% ethyl acetate/hexanes)

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 4-chloro-2-(trifluoromethoxy)aniline (1.0 g, 4.7 mmol) in EtOH (50 mL) at 50° C. was added a slurry of iodine (1.2 g, 9.6 mmol) and silver sulfate (2.6 g, 8.4 mmol) in EtOH (30 mL). The reaction mixture was stirred in darkness at 50° C. for 24 h, then cooled to r.t. and filtered through Celite®. The filtrate was concentrated in vacuo. Purification by column chromatography (SiO2, 0-55% ethyl acetate/hexanes) gave the title compound (1.6 g, quantitative) as a pale brown solid. δH (CDCl3) 7.59 (1H, d, J 1.7 Hz), 7.18 (1H, d, J 1.7 Hz), 4.35 (2H, br. s). LCMS (ES+) 337.8 (M+H)+, RT 3.81 minutes (Method 5). cooled to r.t. filtered through Celite® The filtrate was concentrated in vacuo Purification by column chromatography (SiO2, 0-55% ethyl acetate/hexanes)