반응 #165376

반응 방정식

6-amino-3-bromo-2-methylpyridine

trimethylsilylacetylene

1,4-dioxane

water

→

title compound

수율 68.5%

6-Methyl-5-trimethylsilanylethynyl-pyridin-2-ylamine

수율 68.5%

용매

ethyl acetate

반응 조건

후처리

1. 1
   기타was allowed to room temperature
2. 2
   workup.ADDITIONwas added
3. 3
   여과the mixture was filtered through a Celite pad
4. 4
   기타The organic layer of the filtrate was separated
5. 5
   세척washed with saturated aqueous sodium chloride
6. 6
   농축was concentrated under a reduced pressure
7. 7
   기타the residue thus obtained
8. 8
   기타was purified by silica gel column chromatography (heptane:ethyl acetate=2:1)

실험 절차

To a mixture of 6-amino-3-bromo-2-methylpyridine (200 mg, 1.0 mmol), trimethylsilylacetylene (0.22 mL, 1.6 mmol), copper (I) iodide (9.9 mg, 0.052 mmol), and 1,4-dioxane (1.5 mL) was added bis(triphenylphosphine)palladium (II) chloride (73 mg, 0.10 mmol), which was stirred under nitrogen atmosphere for 3 hours and 30 minutes at 100° C. The reaction mixture was allowed to room temperature, water was added to the reaction mixture at the same temperature, ethyl acetate was added, and the mixture was filtered through a Celite pad. The organic layer of the filtrate was separated and washed with saturated aqueous sodium chloride, and was concentrated under a reduced pressure, and the residue thus obtained was purified by silica gel column chromatography (heptane:ethyl acetate=2:1) to obtain the title compound (140 mg, 57%, purity: 86%).

출처