4-chloro-1,2-bis(trifluoromethyl)benzene

Conditions: temp:140.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3,4-bis(Benzyloxy)-6-ethenylpyridazine (Intermediate 78: 0.578 g, 1.816 mmol), cesium carbonate (0.887 g, 2.72 mmol), dichloropalladiumtricyclohexylphosphane (1:2) (0.067 g, 0.091 mmol) and 4-chloro-1,2-bis(trifluoromethyl)benzene (0.542 g, 2.179 mmol) were combined. The reaction vessel was evacuated and purged with nitrogen before toluene (6.05 ml) was added under vacuum and the whole was stirred under nitrogen and heated to 140° C. for 11 hours. Upon quenching with saturated aqueous ammonium chloride, the resulting mixture was diluted with dichloromethane, passed through a phase separator and concentrated in vacuo. The residue was purified by column chromatography eluting (silica, 0-50% ethyl acetate in petrol) to yield crude 3,4-bis(benzyloxy)-6-[(E)-2-[3,4-bis(trifluoromethyl)phenyl]-ethenyl]-pyridazine which was used directly in the next step without further purification. The reaction vessel was evacuated purged with nitrogen before toluene (6.05 ml) was added under vacuum Upon quenching with saturated aqueous ammonium chloride the resulting mixture was diluted with dichloromethane concentrated in vacuo The residue was purified by column chromatography eluting (silica, 0-50% ethyl acetate in petrol)

Conditions: temp:140.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3,4-bis(Benzyloxy)-6-ethenylpyridazine (Intermediate 78: 0.578 g, 1.816 mmol), cesium carbonate (0.887 g, 2.72 mmol), dichloropalladiumtricyclohexylphosphane (1:2) (0.067 g, 0.091 mmol) and 4-chloro-1,2-bis(trifluoromethyl)benzene (0.542 g, 2.179 mmol) were combined. The reaction vessel was evacuated and purged with nitrogen before toluene (6.05 ml) was added under vacuum and the whole was stirred under nitrogen and heated to 140° C. for 11 hours. Upon quenching with saturated aqueous ammonium chloride, the resulting mixture was diluted with dichloromethane, passed through a phase separator and concentrated in vacuo. The residue was purified by column chromatography eluting (silica, 0-50% ethyl acetate in petrol) to yield crude 3,4-bis(benzyloxy)-6-[(E)-2-[3,4-bis(trifluoromethyl)phenyl]-ethenyl]-pyridazine which was used directly in the next step without further purification. The reaction vessel was evacuated purged with nitrogen before toluene (6.05 ml) was added under vacuum Upon quenching with saturated aqueous ammonium chloride the resulting mixture was diluted with dichloromethane concentrated in vacuo The residue was purified by column chromatography eluting (silica, 0-50% ethyl acetate in petrol)

Conditions: temp:140.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3,4-bis(Benzyloxy)-6-ethenylpyridazine (Intermediate 78: 0.578 g, 1.816 mmol), cesium carbonate (0.887 g, 2.72 mmol), dichloropalladiumtricyclohexylphosphane (1:2) (0.067 g, 0.091 mmol) and 4-chloro-1,2-bis(trifluoromethyl)benzene (0.542 g, 2.179 mmol) were combined. The reaction vessel was evacuated and purged with nitrogen before toluene (6.05 ml) was added under vacuum and the whole was stirred under nitrogen and heated to 140° C. for 11 hours. Upon quenching with saturated aqueous ammonium chloride, the resulting mixture was diluted with dichloromethane, passed through a phase separator and concentrated in vacuo. The residue was purified by column chromatography eluting (silica, 0-50% ethyl acetate in petrol) to yield crude 3,4-bis(benzyloxy)-6-[(E)-2-[3,4-bis(trifluoromethyl)phenyl]-ethenyl]-pyridazine which was used directly in the next step without further purification. The reaction vessel was evacuated purged with nitrogen before toluene (6.05 ml) was added under vacuum Upon quenching with saturated aqueous ammonium chloride the resulting mixture was diluted with dichloromethane concentrated in vacuo The residue was purified by column chromatography eluting (silica, 0-50% ethyl acetate in petrol)