Methanol → HCID 22175637, compound

Participants

Reaction Steps

A mixture of methyl 6-benzyloxy-2-isobutyl-1-oxo-4-trifluoromethanesulfonyloxy-1,2-dihydro-3-isoquinolinecarboxylate (9.24 g, 18 mmol), 4-methylphenylboronic acid (2.94 g, 21.6 mmol) and sodium carbonate (2.86 g, 27 mmol) in toluene (50 ml)-methanol (10 ml)-water (10 ml) was stirred under an argon atmosphere at room temperature for 30 min. To the obtained mixture was added tetrakis(triphenylphosphine)palladium (1.04 g, 1 mmol) and the mixture was refluxed under heating under an argon, atmosphere for 10 h. The reaction mixture was poured into water and extracted with ethyl acetate. After washing the extract with water, the extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to give methyl 6-benzyloxy-2-isobutyl-4-(4-methylphenyl)-1-oxo-1,2-dihydro-3-isoquinolinecarboxylate (6.91 g, 84.4%) as crystals.

Provenance & Evidence