1,4-Dioxane → HCID 118001326, compound

Participants

Reaction Steps

A mixture of 3-(4-methoxy-3-methyl-phenyl)-4-bromo-1,5-dimethyl-1H-pyrazole (described in Reference Preparation example 64) 1.3 g, 1,4-dioxane 30 ml, water 5 ml, methylboronic acid 1.0 g, 1,1′-bis(diphenylphosphino)ferrocene-palladium(II) dichloride dichloromethane adducts 0.4 g and potassium phosphate 3.7 g was stirred with heating under reflux for nine hours. The reaction mixture was extracted with ethyl acetate. The organic layer was washed with water, and was dried over anhydrous magnesium sulfate and was then concentrated under reduced pressure. The resulting residue was subjected to a silica gel column chromatography to give 3-(4-methoxy-3-methyl-phenyl)-1,4,5-trimethyl-1H-pyrazole 0.6 g.

Provenance & Evidence