Ethyl Acetate → 5-Trimethylsilylethynyl-4-methyl-3-nitro-2-pyridone

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of 5-bromo-4-methyl-3-nitro-2-pyridone (1.0 g, 2.8 mmol), trimethylsilylacetylene (1.2 mL, 8.5 mmol), bis(triphenylphosphine)Pd(II) chloride (0.100 g) and cuprous iodide (0.025 g) in DMF (4 mL) and triethylamine (2 mL) was heated at 90 ° C. in a sealed tube for 7 hours. Ethyl acetate was added, and the mixture was washed with water, dried, filtered and evaporated. Chromatography of the residue over silica gel (40% ethyl acetate/hexane) gave 5-trimethylsilylethynyl-4-methyl-3-nitro-2-pyridone (1.0 g, 2.7 mmol, 96%)

Herkunft & Nachweise