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CAS No. : | 1122-72-1 | MDL No. : | MFCD00006291 |
Formula : | C7H7NO | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | AHISYUZBWDSPQL-UHFFFAOYSA-N |
M.W : | 121.14 | Pubchem ID : | 70737 |
Synonyms : |
|
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 |
---|---|---|
With sodium sulfate; In methanol; at 20℃; for 24h;Inert atmosphere; | General procedure: To a solution of (S)-2-aminomethyl-1-N-Cbz-pyrrolidine (1.17g, 5mmol) and pyridine-2-carboxaldehyde (0.535g, 5mmol) in methanol was added some anhydrous Na2SO4, and the reaction mixture was stirred at room temperature for 24 hours, then the mixture was filtered and washed with methanol. Subsequently, NaBH4 (0.756g, 4eq) in small portions were added into the combined filtrates and the resulting mixture was stirring for 12 hours at room temperature before adding enough water to quench the reaction. After evaporation of all volatiles under reduced pressure, the aqueous layer was further extracted with CH2Cl2, the combined organic layers were dried over anhydrous Na2SO4 and the solvent was removed under reduced pressure to give yellow oil of 2a. (1.51g, 93% yield for two steps).1H NMR (CDCl3, 400 MHz): delta 8.44 (s, 1H), 7.60-7.40 (m, 1H), 7.38-7.15 (m, 6H), 7.14-7.00 (m, 1H), 5.03 (dd, J = 18Hz, 12.4 Hz, 2H), 4.15-3.61 (m, 3H), 3.44-3.25( m, 2H), 2.94-2.66 (m, 1H), 2.64-2.42 (m, 1H), 2.28 (s, 1H), 1.98-1.68 (m, 4H). 13C NMR (100 MHz, CDCl3): delta 158.69, 154.31, 148.21, 135.93, 135.38, 127.41, 126.94, 126.85, 126.76, 121.13, 121.05, 120.86, 65.74, 56.79, 54.15, 51.51, 45.89, 28.67, 22.82. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | With chitosan; In neat (no solvent); at 75℃; for 0.1h;Microwave irradiation; Green chemistry; | General procedure: An equimolar mixture of <strong>[54396-44-0]2-methyl-3-(trifluoromethyl)aniline</strong> (0.351 g, 0.002 mol), corresponding aldehyde (0.002 mol), dimethyl phosphite (0.18 ml, 0.002 mol) and chitosan catalyst (10 molpercent) were taken in a reaction glass tube, degassed for 10 min and microwave irradiated at 180 W for 2 min at 60 °C. The progress of the reaction was monitored by TLC using petroleum ether and ethyl acetate (3:7) as solvent. After completion of the reaction, the mixture was diluted with ethyl acetate, washed with water (2 x 15 ml) followed by brine (1 x 10 ml), dried over Na2SO4 and evaporated to dryness. The crude mass was purified by column chromatography on silicagel (100-200 mesh) by using a 7:3 mixture of ethyl acetate in hexane to afford the pure alpha-aminophosphonates. |
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