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CAS No. : | 39885-08-0 | MDL No. : | MFCD09029932 |
Formula : | C7H8ClNO | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | YKQICINWSAISBB-UHFFFAOYSA-N |
M.W : | 157.60 | Pubchem ID : | 21925574 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H332-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 |
---|---|---|
96% | With manganese(IV) oxide In diethyl ether for 0.5 h; | To prepare this compound, manganese dioxide (13.6 g, 157 mmol) was added to a solution of 2-(amino-6-chlorophenyl)methanol (2.75 g, 17.5 mmol) in 150 mL diethyl ether. The mixture was stirred for 0.5 hours then filtered through celite and rinsed with ethyl acetate. The filtrate was concentrated under reduced pressure to afford 2.62 g(96percent) of 2-amino-6-chlorobenzaldehyde. |
85% | With manganese(IV) oxide In dichloromethane at 20℃; for 23 h; Inert atmosphere | General procedure: To a solution of 1a (1.2?g, 7.61?mmol) in CH2Cl2 (20?mL) was added MnO2 (2.6?g, 30.1?mmol) and stirred at rt under an Ar atmosphere. After 23?h with stirring, the reaction mixture was filtrated and evaporated. The residue was crystallized from AcOEt to give 7a (1.0?g, 85percent) as a yellow needle crystal. Mp 96–97?°C. IR (KBr): 3422, 3315, 1650, 1624, 1542, 1398, 1234, 919, 772?cm?1. 1H NMR (400?MHz, CD3OD) δ: 6.60 (1H, dd, J?=?0.8, 7.6?Hz), 6.68 (1H, td, J?=?0.8, 8.4?Hz), 7.18 (1H, dd, J?=?7.6, 8.4?Hz), 10.41 (1H, d, J?=?0.8?Hz). 13C NMR (100?MHz, CD3OD) δ: 114.6, 117.0, 117.5, 136.7, 140.2, 154.6, 193.3. HRMS (EI) Calcd for C7H6ClNO [M]+: 155.0138. Found: 155.0141. |
10% | With manganese(IV) oxide In diethyl ether at 20℃; for 6 h; | 2.30 g (14.6 mmol) of (2-amino-6-chlorophenyl)methanol prepared in step 1, MnO2 (10 equivalent), and diethylether (50 mL) were mixed together, which was stirred at room temperature for 6 hours. The reaction mixture was filtered with celite pad, and concentrated under reduced pressure. The residue was separated by column chromatography (SiO2, eluent: hexane/CH2Cl2, 5/1->CH2Cl2) to give 2.27 g of the target compound 2-amino-6-chlorobenzaldehyde as a yellow solid (14.6 mmol, yield: 10percent). 1H NMR(300 MHz, CDCl3) δ 10.48 (s, 1H) , 7.17 (t, J=8.2 Hz, 1H), 6.67 (d, J=7.7 Hz, 1H), 6.54 (d, J=8.4 Hz, 1H) , 6.48 (br s, 2H). |
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