4-bromo-2-propan-2-ylaniline

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: The titled compound was prepared according to the method described in Example 1B substituting 2-acetylamino-acrylic acid methyl ester for 2-acetylamino-acrylic acid benzyl ester and 4-bromo-2-isopropylaniline for 4-bromo-2-ethylaniline.

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

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

Procedure: In a manner analogous to example 9a, the process is carried out by a reaction of 89 g (185 mmol) of tetra-n-butylammonium tribromide with 25 g (185 mmol) of 2-isopropylaniline. 22 g of 4-bromo-2-isopropyl-phenylamine are obtained (yield=57%).

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

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

Procedure: A solution of 4-bromo-2-iso-propyl-phenylamine (780 mg, 3.64 mmol) in acetic anhydride (4 mL) was stirred at room temperature over night. The reaction was poured into water and the resulting white precipitate was filtered off and dried under vacuum to give N-(4-bromo-2-iso-propyl-phenyl)-acetamide as a light pink solid (0.770 g, 83%); 1H NMR (300 MHz, DMSO-d6): δ 9.39(s, 1H), 7.43(d, 1H, J=2.4 Hz), 3.16(m, 1H), 2.04(s, 3H), 1.13(d, 6H, J=7 Hz); TLC conditions: Uniplate silica gel, 250 microns; Mobile phase=dichloromethane; Rf=0.21 the resulting white precipitate was filtered off dried under vacuum

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

Procedure: To a cooled solution of 2-iso-propyl aniline (714 mg, 5.28 mmol) in dichloromethane (20 mL) at −50° C. in a dry ice/acetone bath was added a solution of bromine (269 μl, 5.28 mmol) in dichloromethane (5 mL) over 20 min. After completion of the addition, the reaction mixture was stirred for an additional hour. Purification by column chromatography (silica gel, hexane/ethyl acetate) gave 4-bromo-2-iso-propyl-phenylamine as a brown oil (1.53 g, 57%); 1H NMR (300 MHz, DMSO-d6): δ 7.01(m, 2H), 6.55(d, 1H, J=13 Hz), 5.05(bs, 2H), 2.92(m, 1H), 1.11 (d, 6H, J=7 Hz); TLC conditions: Uniplate silica gel, 250 microns; Mobile phase=Hexane/ethyl acetate [10:1]; Rf=0.11 After completion of the addition Purification by column chromatography (silica gel, hexane/ethyl acetate)

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

Procedure: A solution of 4-bromo-2-iso-propyl-phenylamine (780 mg, 3.64 mmol) in acetic anhydride (4 mL) was stirred at room temperature over night. The reaction was poured into water and the resulting white precipitate was filtered off and dried under vacuum to give N-(4-bromo-2-iso-propyl-phenyl)-acetamide as a light pink solid (0.770 g, 83%); 1H NMR (300 MHz, DMSO-d6): δ 9.39 (s, 1H), 7.43 (d, 1H, J=2.4 Hz), 3.16 (m, 1H), 2.04 (s, 3H), 1.13 (d, 6H, J=7 Hz); TLC conditions: Uniplate silica gel, 250 microns; Mobile phase=dichloromethane; Rf=0.21 the resulting white precipitate was filtered off dried under vacuum

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

Procedure: To a cooled solution of 2-iso-propyl aniline (714 mg, 5.28 mmol) in dichloromethane (20 mL) at −50° C. in a dry ice/acetone bath was added a solution of bromine (269 μl, 5.28 mmol) in dichloromethane (5 mL) over 20 min. After completion of the addition, the reaction mixture was stirred for an additional hour. Purification by column chromatography (silica gel, hexane/ethyl acetate) gave 4-bromo-2-iso-propyl-phenylamine as a brown oil (1.53 g, 57%); 1H NMR (300 MHz, DMSO-d6): δ 7.01 (m, 2H), 6.55 (d, 1H, J=13 Hz), 5.05 (bs, 2H), 2.92 (m, 1H), 1.11 (d, 6H, J=7 Hz); TLC conditions: Uniplate silica gel, 250 microns; Mobile phase=Hexane/ethyl acetate [10:1]; Rf=0.11 After completion of the addition Purification by column chromatography (silica gel, hexane/ethyl acetate)

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

Procedure: The titled compound was prepared according to the method described in Example 1B substituting 2-acetylamino-acrylic acid methyl ester for 2-acetylamino-acrylic acid benzyl ester and 4-bromo-2-isopropylaniline for 4-bromo-2-ethylaniline.