Potassium Carbonate → 8-(4-tert-Butoxycarbonylmethyl-2-isopropoxy-phenyl)-5-fluoro-3,4-dihydro-1H-isoquinoline-2-carboxylic acid benzyl ester

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Reaction Steps

A mixture under N2 of (4-chloro-3-isopropoxy-phenyl)-acetic acid tert-butyl ester (142 mg, 0.50 mmol, 1.00 eq.), 5-fluoro-8-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-3,4-dihydro-1H-isoquinoline-2-carboxylic acid benzyl ester (232 mg, 0.50 mmol, 1.00 eq.), bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II) (18 mg, 0.03 mmol, 0.05 eq.) and potassium carbonate (138 mg, 1.00 mmol, 2.00 eq.) in toluene (2.5 mL) and water (0.25 mL) was stirred at 110° C. for 2 days. The mixture was allowed to cool to r.t., filtered through celite, and concentrated in vacuo. The residue was purified by flashmaster (column: 25 g, flow: 30 mL/min, 30 fractions of 30 mL, Heptane 100% to Heptane+20% AcOEt) to yield the title compound as a pale yellow oil.

Provenance & Evidence