Triethylamine → 2-Methyl-5-((trimethylsilyl)ethynyl)benzamide

Participants

Reaction Conditions

Reaction Steps

To a mixture of 5-bromo-2-methylbenzamide (I69) (0.292 g, 1.36 mmol), PdCl2(PPh3)2 (0.049 g, 0.070 mmol), triphenylphosphine (0.054 g, 0.21 mmol) and copper iodide (0.036 g, 0.19 mmol) in DMF (3 mL) was added triethylamine (0.570 mL, 4.09 mmol) and trimethylsilylacetylene (0.210 mL, 1.49 mmol) and the resulting mixture heated under microwave irradiation at 120° C. for 25 minutes. The resulting mixture was concentrated under reduced pressure and purified using silica gel column chromatography (0-20% EtOAc/petroleum benzine 40-60° C.) to give the title compound (I70) (0.190 g, 60%); 1H NMR (400 MHz, d6-DMSO) δ 7.80 (s, 1H), 7.40 (m, 3H), 7.24 (d, J=7.9 Hz, 1H), 2.36 (s, 3H), 0.22 (s, 9H).

Provenance & Evidence