反应详情

A mixture of 1.0 g (4.6 mmol) 2-bromo-5-nitroaniline, 20 ml benzene, 10 ml 2 N sodium carbonate solution, 159 mg (0.14 mmol) tetrakis (triphenylphosphine)-palladium(0) and 725 mg (5.07 mmol) o-tolylboronic acid was heated under argon at 60° for 20 hrs. After cooling to room temperature, the aqueous phase was separated and washed twice with toluene. The combined organic layers were washed with brine, dried (Na2SO4) and evaporated. The residue was purified by chromatography (SiO2, CH2Cl2/hexane 2:1) to yield 950 mg (91%) of 2′-methyl-4nitro-biphenyl-2-ylamine as a pale yellow oil, MS (EI): 228 (M+).

1. temperaturewas heated under argon at 60° for 20 hrs
2. customthe aqueous phase was separated
3. washwashed twice with toluene
4. washThe combined organic layers were washed with brine
5. dry with materialdried (Na2SO4)
6. customevaporated
7. customThe residue was purified by chromatography (SiO2, CH2Cl2/hexane 2:1)