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CAS No. : | 3484-35-3 | MDL No. : | MFCD02379906 |
Formula : | C9H9NO | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | HXQDSHSATAEREW-UHFFFAOYSA-N |
M.W : | 147.17 | Pubchem ID : | 5325716 |
Synonyms : |
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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 |
---|---|---|
79% | With piperidine; In ethanol;Reflux; | General procedure: To a mixture of oxindole (3a-f, 0.3mmol), 1-alkyl-1H benzo[d]imidazole-2-carbaldehydes (7a-e, 0.33mmol) in ethanol (2mL), was added catalytic amount of piperidine. The reaction mixture was stirred at reflux until complete consumption of the oxindole observed by TLC. After cooling, the precipitate was filtered, washed with cold ethanol, and dried in air to furnish pure (E)-benzo[d]imidazol-2-yl)methylene)indolin-2-ones 8a-z orange/yellow solids in moderate to good yields. Compounds 8c, 8f, 8i, 8l and 8o did not precipitated out from ethanol, were purified by column chromatography with silica gel (60-120) by using ethyl acetate:hexane (2:8 to 3:7). 4.1.1.13 (E)-5-Methyl-3-((1-methyl-1H-benzo[d]imidazol-2-yl)methylene)indolin-2-one (8m) Orange solid, Yield 79%; mp: 266-268 C; FT-IR: (cm-1): 3183, 3056, 2916, 1702, 1612, 1321, 815, 737; 1H NMR (500 MHz, DMSO-d6): δ 10.59 (brs, 1H, NH), 9.35 (s, 1H, Ar-H), 7.84 (d, J = 8.1 Hz, 1H, Ar-H), 7.69 (d, J = 8.1 Hz, 1H, Ar-H), 7.55 (s, 1H, C=CH), 7.41-7.31 (m, 2H, Ar-H), 7.15 (d, J = 7.8 Hz, 1H, Ar-H), 6.79 (d, J = 7.8 Hz, 1H, Ar-H), 4.02 (s, 3H, CH3), 2.35 (s, 3H, CH3); 13C NMR (75 MHz, CDCl3+DMSO-d6): δ 168.9, 147.5, 142.6, 141.0, 135.4, 131.4, 130.9, 129.9, 128.4, 123.9, 122.7, 120.9, 119.5, 117.3, 110.4, 109.1, 30.0, 20.8; HRMS (ESI): m/z calcd for C18H16N3O 290.1293, found 290.1279 [M+H]+; Purity: 99.2%. |
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5-Aminoindolin-2-one hydrochloride
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5-Aminoindolin-2-one hydrochloride
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