反应详情

N2-methylpyridine-2,3-diamine (11.95 g, 97 mmol), iodobenzene (16.22 ml, 146 mmol), sodium 2-methylpropan-2-olate (13.99 g, 146 mmol), 8,8′-bis(diphenylphosphino)-1,1′-binaphthalene (BINAP) (60.4 g, 97 mmol) with toluene (400 mL) were added to a three necked 1 L round bottom flask. The reaction was degassed with N2 for 20 minutes. Pd2(dba)3 (1.777 g, 1.941 mmol) was added and the reaction mixture was refluxed for 20 h. The reaction mixture was concentrated to dryness. Residue was dissolved in EtOAc. It was not clear solution, but a suspension was obtained and then filtered through a silica gel plug. The desired product was concentrated and recrystallized from DCM/hexanes providing a yield of 6.45 g, 33.3%.

1. customThe reaction was degassed with N2 for 20 minutes
2. temperaturethe reaction mixture was refluxed for 20 h
3. concentrationThe reaction mixture was concentrated to dryness
4. dissolutionResidue was dissolved in EtOAc
5. customa suspension was obtained
6. filtrationfiltered through a silica gel plug
7. concentrationThe desired product was concentrated
8. customrecrystallized from DCM/hexanes providing a yield of 6.45 g, 33.3%