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CAS No. : | 4489-34-3 | MDL No. : | MFCD00672147 |
Formula : | C5H4Cl2N2O2S | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | DROUVIKCNOHKBA-UHFFFAOYSA-N |
M.W : | 227.07 | Pubchem ID : | 239685 |
Synonyms : |
|
Chemical Name : | 4,6-Dichloro-2-methylsulfonylpyrimidine |
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
28% | With caesium carbonate; In acetonitrile; at 20℃; for 8h; | A 250 mL 2-neck round-bottomed equipped with stir bar was charged with 4,6-dichloro-2-(methylsulfonyl)pyrimidine (5.0 g, 22.12 mmol, 1.0 eq.), ethyl 1H- pyrazole-3-carboxylate (3.10 g, 22.12 mmol, 1.0 eq.) and cesium carbonate (7.28 g, 22.12 mmol,1.0 eq.) in acetonitrile (50 mL) stirred at ft for 8 h. Progress of the reaction was monitored by TLC. Reaction mass diluted with water (80 mL), extracted with ethyl acetate (2 x 40 mL) and the combined organic layer was washed with water (50 ml), brine (25 mL), dried over anhydrous sodium sulfate and concentrated under reduced pressure. The crude product was purified by CombiFlash by using with 15percent ethyl acetate in hexane as eluent. The desired fractions were evaporated under reduced pressure to afford ethyl 1-(4,6- dichloropyrimidin-2-yl)- 1 H-pyrazole-3 -carboxylate (off-white solid) (1.8 g, 6.26 mmol, 28percent) MS (M+H): mlz=287.10. |
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