反応 #52395

反応方程式

Reagent G

methyl-2-fluoro-4-iodo-benzoate

Intermediate 44

8-cyclopropyl-6-ethynyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1′-cyclopropane]

methyl-2-fluoro-4-iodo-benzoate

triethyl amine

tetrahydrofuran

8-cyclopropyl-6-ethynyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1′-cyclopropane]

→

title compound

4-[(8-Cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1′-cyclopropane]-6-yl)ethynyl]-2-fluoro-benzoic acid methyl ester

溶媒

ethyl acetate

hexane

反応条件

実験手順

Following general procedure F and using 8-cyclopropyl-6-ethynyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1′-cyclopropane] (Intermediate 44, 0.03 g, 0.11 mmol), methyl-2-fluoro-4-iodo-benzoate (Reagent G, 0.025 g, 0.09 mmol), triethyl amine (3 mL), tetrahydrofuran(3 mL), copper(I)iodide(0.020 g, 0.1 mmol) and dichlorobis(triphenylphosphine)palladium(II) (0.06 g, 0.085 mmol) followed by preparative normal phase HPLC using 10% ethyl acetate in hexane as the mobile phase, the title compound was obtained as a white solid (0.019 g, 40%).

出典