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CAS No. : | 100939-91-1 | MDL No. : | MFCD04116565 |
Formula : | C12H16N2O | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | YHGUVIUZDTUVKZ-UHFFFAOYSA-N |
M.W : | 204.27 | Pubchem ID : | 2760448 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P264-P270-P271-P280-P301+P312-P302+P352-P304+P340-P330-P363-P501 | UN#: | |
Hazard Statements: | H302-H312-H332 | 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 |
---|---|---|
General procedure: A solution of 4-carboxyphenylboronic acid (0.83 g, 5 mmol) in anhydrous DMF 10 ml was treated with pyBOP followed by anhydrous triethylamine 1.5 ml. After stirring at room temperature for 30 min, 1-(2,4-dichlorobenzoyl)piperazine was added and the reaction mixture was allowed to stir for another 24 h at room temperature. The mixture was dissolved in 100 ml H2O and then extracted with ethyl acetate (30 mL * 3). The combined organic layer was washed with brine dried over Na2SO4 for overnight, filtered, and concentrated in vacuo. The crude product was purified by flash chromatography to give (4-[4-(2,4-dichlorobenzoyl)piperazin-1-yl]carbonyl}phenyl) -boronic acid (0.6 g, 30%). The intermediate compounds 8b∼8t were prepared using the similar procedure described above. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
21% | General procedure: In a 100mL flask,4-{6-[(4-methoxyphenyl)amino]pyrimidin-4-yl} benzoic acid (4) (1.28g,4mmol) and 4-methylmorpholine (1.3mL, 12mmol) were dissloved in CH2Cl2(20mL). Under 0C, the CH2Cl2 (8mL) solution of isobutylchloroformate (0.8mL, 6mmol) was dropped slowly into the above suspension. Thenthe mixture was reacted under 0C for 1h.After that, the CH2Cl2 (15mL) solutionof 1-(2-fluorobenzoyl)piperazine (6-1) (0.91g, 4.4mmol) and4-methylmorpholine (1.3mL, 12mmol) was dropped slowly into the above solution.Then the ice bath was removed and the mixture was reacted at r.t. overnight.The mixture was diluted with CH2Cl2 (30mL), and waswashed with water (15mL×3), saturated NaHCO3 solution (10mL), NaCl solution (10mL). Then the organic phase was dried by Na2SO4,and filtered, giving the crude product. The crude product was purified bychromatography (ether/ethyl acetate = 1:5), giving a solid (0.45g, 22%). Mp235-236C. Compounds P2-P10 were also prepared by usingthe general procedure described above. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
General procedure: Trimethylacetyl chloride(1.21mL, 10mmol) and the excess of triethylamine (15mmol) were added to amixture of 2-fluorobenzoic acid (1.39g,10mmol) in CH2Cl2 (50mL). The resulting mixture wasstirred at r.t. until a clear solution was observed. A solution of piperazine (1.76g, 20mmol) in EtOH (50mL) was added,and the mixture was further stirred for 3-4h. Concd HCl (2mL) was added and theresulting mixture was extracted with CH2Cl2 (20mL). TheCH2Cl2 layer was discarded. NaOH (4.00g) was added to the aqueous solution and thenextracted with CH2Cl2 (150mL). The organic extract wasfurther washed with H2O (50mL) and then dried by Na2SO4.Evaporation of the solvent at reduced pressure yielded the crude productreserved for the next step. Compounds 6-2-6-10 were prepared by using thegeneral procedure described above. |
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