Benzophenone imine → 1-[5-(benzhydrylidene-amino)-1-(3-methyl-butyl)-1H-benzoimidazol-2-ylmethyl]-3-isopropyl-1,3-dihydro-benzoimidazol-2-one

Participants

Reaction Steps

A mixture of 1-[5-bromo-1-(3-methyl-butyl)-1H-benzoimidazol-2-ylmethyl]-3-isopropyl-1,3-dihydro-benzoimidazol-2-one (45 mg, 0.1 mmol), benzophenone imine (22 mg, 0.12 mmol), sodium tert-butoxide (13 mg, 0.14 mmol), BINAP (19 mg, 0.03 mmol) and Pd2(dba)3 (9 mg, 0.01 mmol) in toluene (2 mL) was heated to reflux for 6 h. After cooling, the reaction mixture was diluted with EtOAc and washed with sat. NaHCO3 and brine. The organic layer was dried over MgSO4 and evaporated. The residue was purified by flash chromatography (hexanes:EtOAc 4:1 to 1:1) to give 48 mg (87%) of 1-[5-(benzhydrylidene-amino)-1-(3-methyl-butyl)-1H-benzoimidazol-2-ylmethyl]-3-isopropyl-1,3-dihydro-benzoimidazol-2-one as a yellow solid.

Provenance & Evidence