反应详情

To a stirred solution of 176 mg (0.5 mmol) of 5-amino-3-(methylthio)-1-(2,4,6-trichlorophenyl)pyrazole-4-carboxamide in 6 mL of absolute ethanol was added 550 mg (3.0 mmol) of 3-methoxyphenylacetyl chloride followed by 2.3 mL (6.0 mmol) of 2.66 M sodium ethoxide in ethanol. The solution was stirred 18 h at reflux, and the heating mantle was then removed. The reaction was treated with 5 mL of 10% aq. HOAc, cooled to ambient temperature, and filtered. The filtrate was washed with 6 mL of 1:1 water-methanol then 6 mL of 1:1 ether-hexanes. The off-white solid was briefly air-dried to give 220 mg (92%) of 1-(2,4,6-trichlorophenyl)-3-(methylthio)-6-(3-methoxybenzyl)pyrazolo[3,4-d]pyrimidin-4-one, mp 245-248° C. Mass spec. Calc'd for C20H16N4O2SCl3: 481.0060. Found: 481.0076 (M+H)+.

1. temperatureat reflux
2. customthe heating mantle was then removed
3. additionThe reaction was treated with 5 mL of 10% aq. HOAc
4. filtrationfiltered
5. washThe filtrate was washed with 6 mL of 1:1 water-methanol
6. customThe off-white solid was briefly air-dried