methyl 2-(4-amino-3-bromophenyl)acetate

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 mixture of methyl 4-amino-3-bromophenylacetate (587 mg, 2.40 mmol) and 2-bromophenyl isocyanate (0.30 ml, 2.40 mmol) in THF (2 ml) was added Et3N (33 ml, 0.24 mmol) at room temperature. After 4 h stirring, the reaction mixture was concentrated in vacuo. The residue was triturated by the addition of n-hexane to give methyl 3-bromo-4-[N′-(2-bromophenyl)ureido]phenylacetate (770 mg, 73%) as a pale brown powder. 1H-NMR (CDCl3) δ3.55 (s, 2H), 3.70 (s, 3H), 6.97 (dd, J=7.3, 1.5 Hz, 1H), 7.22 (dd, J=8.5, 2.2 Hz, 1H), 7.29-7.33 (m, 2H), 7.48 (d, J=1.0, 2.2 Hz, 1H), 7.54 (dd, J=8.0, 1.2 Hz, 1H), 8.01 (m, 2H); MS (ESI) m/z 443 (M++1), 445 (M++3), 447 (M++5). the reaction mixture was concentrated in vacuo The residue was triturated by the addition of n-hexane

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

Procedure: To a mixture of methyl 4-amino-3-bromophenylacetate (587 mg, 2.40 mmol) and 2-chlorophenyl isocyanate (0.29 ml, 2.40 mmol) in THF (2 ml) was added Et3N (33 ml, 0.24 mmol) at room temperature. After 21 h stirring, the reaction mixture was concentrated in vacuo. The residue was triturated by the addition of n-hexane to give methyl 3-bromo-4-[N′-(2-chlorophenyl)ureido]phenylacetate (710 mg, 74%) as a pale brown powder. 1H-NMR (CDCl3) δ3.57 (s, 2H), 3.70 (s, 3H), 7.02-7.28 (m, 2H), 7.36 (d, J=6.8 Hz, 1H), 7.48 (s, 1H), 8.00-8.11 (m, 2H); MS (ESI) m/z 397 (M+), 399 (M++2), 401 (M++4). the reaction mixture was concentrated in vacuo The residue was triturated by the addition of n-hexane

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

Procedure: To a mixture of methyl 4-amino-3-bromophenylacetate (587 mg, 2.40 mmol) and 2-methylphenyl isocyanate (0.287 ml, 2.40 mmol) in THF (2 ml) was added Et3N (33 ml, 0.24 mmol) at room temperature. After 21 h stirring, the reaction mixture was concentrated in vacuo. The residue was triturated by the addition of n-hexane to give methyl 3-bromo-4-[N′-(2-methylphenyl)ureido]phenylacetate (650 mg, 72%) as a pale brown powder. 1H-NMR (CDCl3) δ2.34 (s, 3H), 3.53 (s, 2H), 3.68 (s, 3H), 6.18 (br, 1H), 6.96 br, 1H), 7.18-7.33 (m, 4H), 7.29 (d, J=4.4 Hz, 1H), 7.30 (d, J=7.3 Hz, 1H), 8.19 (d, J=8.3 Hz, 1H); MS (ESI) m/z 377 (M+), 379 (M++2). the reaction mixture was concentrated in vacuo The residue was triturated by the addition of n-hexane

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of methyl 3-bromo-4-nitrophenylacetate (14.8 g, 53.8 mmol), reduced iron powder (9.62 g, 172 mmol), AcONa.3H2O (7.32 g, 53.8 mmol) and AcOH (20.0 ml) in MeOH/H2O (150/600 ml) was heated at 90° C. for 1 h. After cooled to room temperature, the reaction mixture was filtered through Celite and the filtered cake was washed with MeOH. The combined filtrate were evaporated and extracted with EtOAc. The extracts were washed with brine, dried over Na2SO4 and concentrated in vacuo. The residue was chromatographed on silica gel [400 g, CHCl3/EtOAc (20/1)] to give methyl 4-amino-3-bromophenylacetate (9.01 g, 69%) as a brown oil. 1H-NMR (CDCl3) δ3.48 (s, 2H), 3.68 (s, 3H), 4.05 (br, 2H), 6.69 (d, J=8.3 Hz, 1H), 7.00 (dd, J=8.1, 2.0 Hz, 1H), 7.32 (d, J=2.0 Hz, 1H). After cooled to room temperature the reaction mixture was filtered through Celite the filtered cake was washed with MeOH The combined filtrate were evaporated extracted with EtOAc The extracts were washed with brine dried over Na2SO4 concentrated in vacuo The residue was chromatographed on silica gel [400 g, CHCl3/EtOAc (20/1)]

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

Procedure: To a mixture of methyl 4-amino-3-bromophenylacetate (587 mg, 2.40 mmol) and 2-bromophenyl isocyanate (0.30 ml, 2.40 mmol) in THF (2 ml) was added Et3 N (33 ml, 0.24 mmol) at room temperature. After 4 h stirring, the reaction mixture was concentrated in vacuo. The residue was triturated by the addition of n-hexane to give methyl 3-bromo-4-[N′-(2-bromophenyl)ureido]phenylacetate (770 mg, 73%) as a pale brown powder. 1H-NMR (CDCl3) δ 3.55 (s, 2H), 3.70 (s, 3H), 6.97 (dd, J=7.3, 1.5 Hz, 1H), 7.22 (dd, J=8.5, 2.2 Hz, 1H), 7.29–7.33 (m, 2H), 7.48 (d, J=1.0, 2.2 Hz, 1H), 7.54 (dd, J=8.0, 1.2 Hz, 1H), 8.01 (m, 2H); MS (ESI) m/z 443 (M++1), 445 (M++3), 447 (M++5). was added Et3 N (33 ml, 0.24 mmol) at room temperature the reaction mixture was concentrated in vacuo The residue was triturated by the addition of n-hexane

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

Procedure: To a mixture of methyl 4-amino-3-bromophenylacetate (587 mg, 2.40 mmol) and 2-chlorophenyl isocyanate (0.29 ml, 2.40 mmol) in THF (2 ml) was added Et3 N (33 ml, 0.24 mmol) at room temperature. After 21 h stirring, the reaction mixture was concentrated in vacuo. The residue was triturated by the addition of n-hexane to give methyl 3-bromo-4-[N′-(2-chlorophenyl)ureido]phenylacetate (710 mg, 74%) as a pale brown powder. 1H-NMR (CDCl3) δ 3.57 (s, 2H), 3.70 (s, 3H), 7.02–7.28 (m, 2H), 7.36 (d, J=6.8 Hz, 1H), 7.48 (s, 1H), 8.00–8.11 (m, 2H); MS (ESI) m/z 397 (M+), 399 (M++2), 401 (M++4). was added Et3 N (33 ml, 0.24 mmol) at room temperature the reaction mixture was concentrated in vacuo The residue was triturated by the addition of n-hexane

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

Procedure: To a mixture of methyl 4-amino-3-bromophenylacetate (587 mg, 2.40 mmol) and 2-methylphenyl isocyanate (0.287 ml, 2.40 mmol) in THF (2 ml) was added Et3 N (33 ml, 0.24 mmol) at room temperature. After 21 h stirring, the reaction mixture was concentrated in vacuo. The residue was triturated by the addition of n-hexane to give methyl 3-bromo-4-[N′-(2-methylphenyl)ureido]phenylacetate (650 mg, 72%) as a pale brown powder. 1H-NMR (CDCl3) δ2.34 (s, 3H), 3.53 (s, 2H), 3.68 (s, 3H), 6.18 (br, 1H), 6.96 (br, 1H), 7.18–7.33 (m, 4H), 7.29 (d, J=4.4 Hz, 1H), 7.30 (d, J=7.3 Hz, 1H), 8.19 (d, J=8.3 Hz, 1H); MS (ESI) m/z 377 (M+), 379 (M++2). was added Et3 N (33 ml, 0.24 mmol) at room temperature the reaction mixture was concentrated in vacuo The residue was triturated by the addition of n-hexane

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of methyl 3-bromo-4-nitrophenylacetate (14.8 g, 53.8 mmol), reduced iron powder (9.62 g, 172 mmol), AcONa.3H2O (7.32 g, 53.8 mmol) and AcOH (20.0 ml) in MeOH/H2O (150/600 ml) was heated at 90° C. for 1 h. After cooled to room temperature, the reaction mixture was filtered through Celite and the filtered cake was washed with MeOH. The combined filtrate were evaporated and extracted with EtOAc. The extracts were washed with brine, dried over Na2SO4 and concentrated in vacuo. The residue was chromatographed on silica gel [400 g, CHCl3/EtOAc (20/1)] to give methyl 4-amino-3-bromophenylacetate (9.01 g, 69%) as a brown oil. 1H-NMR (CDCl3) δ 3.48 (s, 2H), 3.68 (s, 3H), 4.05 (br, 2H), 6.69 (d, J=8.3 Hz, 1H), 7.00 (dd, J=8.1, 2.0 Hz, 1H), 7.32 (d, J=2.0 Hz, 1H). After cooled to room temperature the reaction mixture was filtered through Celite the filtered cake was washed with MeOH The combined filtrate were evaporated extracted with EtOAc The extracts were washed with brine dried over Na2SO4 concentrated in vacuo The residue was chromatographed on silica gel [400 g, CHCl3/EtOAc (20/1)]