反应详情

3,4-Difluoro-2-(2-fluoro-4-iodo-phenylamino)-N-(2-hydroxy-ethoxy)-5-(3-oxo-isoxazolidin-2-ylmethyl)-benzamide (36.9 mg, 66.9 μmol) obtained in Example 37, bis(acetonitrile)dichloropalladium (II) (3.5 mg, 13.5 μmol), 3,3′,3″-phosphinidine-tris(benzenesulfonic acid) trisodium salt (19.0 mg, 33.4 μmol), and copper iodide (I) (2.6 mg, 13.6 μmol) were suspended in methanol (2.5 ml) under a nitrogen atmosphere. To this suspension, N,N-diisopropylethylamine (14.0 μl, 80.4 μmol) and trimethylsilylacetylene (47.3 μl, 334.7 μmol) were added at room temperature, and the mixture was stirred for 1 hour. The reaction mixture was diluted with methylene chloride (30 ml), and washed with saturated brine (2×15 ml). The organic layer was dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The resultant residue was dissolved in THF (2 ml). To this solution, tetrabutylammonium fluoride (1.0 M solution in THF, 0.10 ml, 0.10 mmol) was added, and the mixture was stirred for 1 hour, and then concentrated under reduced pressure. The resultant residue was purified by preparative TLC (EtOAc/MeOH (8:1)) to give 2-(4-ethynyl-2-fluoro-phenylamino)-3,4-difluoro-N-(2-hydroxy-ethoxy)-5-(3-oxo-isoxazolidin-2-ylmethyl)-benzamide (Compound G-5, 11.1 mg, 37%) as a brown oil.

1. washwashed with saturated brine (2×15 ml)
2. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
3. concentrationconcentrated under reduced pressure
4. dissolutionThe resultant residue was dissolved in THF (2 ml)
5. stirringthe mixture was stirred for 1 hour
6. concentrationconcentrated under reduced pressure
7. customThe resultant residue was purified by preparative TLC (EtOAc/MeOH (8:1))