4,4'-Dibromobiphenyl → HCID 66797677, compound

Participants

Reaction Steps

20 g (70.58 mmol) of 12,12-dimethyl-10,12-dihydro-10-azaindeno[2,1-b]-fluorene and 33 g (105.87 mmol) of 4,4′-dibromobiphenyl are dissolved in toluene and degassed by introduction of a protective gas. 4.94 ml (4.94 mmol/1 M solution in toluene) of tri-tert-butylphosphine, 633.8 mg (2.82 mmol) of Pd(OAc)2 and 10.2 g (105.87 mmol) of NaOtBu are subsequently added. The solids are degassed in advance, the reaction mixture is subsequently degassed and then stirred under reflux for 5 h. The warm reaction solution is filtered through Alox B (activity grade 1), washed with water, dried and evaporated. Crystallisation from toluene gives 15.6 g (30.4 mmol) (43%) of the product as a white solid.

Provenance & Evidence