反应详情

Under a dry nitrogen atmosphere, a stirred mixture of 0.60 gram (0.0019 mole) of 2-(4-chlorophenyl)-5-iodothiazole, 0.21 gram (0.0021 mole) of phenylacetylene, 20 ml of triethylamine, 10 ml of acetonitrile, 0.013 gram (1.0×10-5 mole) of dichlorobis(triphenylphosphine)[palladium (II), and 0.013 gram (6.5×10-5 mole) of copper (I) iodide was heated at reflux for two days. The reaction mixture was cooled, and was then poured into 100 ml of an aqueous, 10% ammonium chloride solution. This mixture was extracted with 100 ml of diethyl ether. The organic extract was washed with an aqueous, saturated ammonium chloride solution followed by two 100 ml portions of water. The washed extract was dried over anhydrous sodium sulfate and was filtered through a pad of Celite® filter aid. The filtrate was evaporated under reduced pressure leaving a residue. This residue was purified by column chromatography on silica gel, eluting with methylene chloride:n-hexane (3:1), to yield 0.4 gram of 1-[2-(4-chlorophenyl)thiazol-5-yl]-2-phenylethyne as a solid, m.p. 108°-110° C., Compound 7 of Table 1.

1. temperaturewas heated
2. temperatureat reflux for two days
3. temperatureThe reaction mixture was cooled
4. extractionThis mixture was extracted with 100 ml of diethyl ether
5. extractionThe organic extract
6. washwas washed with an aqueous, saturated ammonium chloride solution
7. extractionThe washed extract
8. dry with materialwas dried over anhydrous sodium sulfate
9. filtrationwas filtered through a pad of Celite®
10. filtrationfilter aid
11. customThe filtrate was evaporated under reduced pressure
12. customleaving a residue
13. customThis residue was purified by column chromatography on silica gel
14. washeluting with methylene chloride:n-hexane (3:1)