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CAS No. : | 95-00-1 | MDL No. : | MFCD00008109 |
Formula : | C7H7Cl2N | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | SJUKJZSTBBSGHF-UHFFFAOYSA-N |
M.W : | 176.04 | Pubchem ID : | 1485 |
Synonyms : |
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Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P280-P305+P351+P338-P310 | UN#: | 2735 |
Hazard Statements: | H314 | Packing Group: | Ⅲ |
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 |
---|---|---|
82% | To a suspension of 5-Formyl- 2- thiophenecarboxylic acid (2 g, 12.81 mmol) in 50 ml dichloromethane at 0°C, 1-Chlor-N,N,2-trimethylpropinylamin (1.88 g, 14.1 mmol) was added. The mixture was stirred 5 min at 0°C and then was allowed to reach RT and stirred at this temperature for 15 min. To the obtained clear solution, a solution of 2,4-dichlorobenzylamine (2.5 g, 14.1 mmol) and triethylamine (19.2 mmol) in 10 ml dichloromethane were added and the reaction was stirred at RT overnight. The mixture was diluted with dichloromethane and washed with aqueous HCl (0.25 M). The organic layer was dried, filtered off and concentrated under reduced pressure. The obtained residue- 5-Formyl-thiophene-2-carboxylic acid 2,4-dichloro-benzylamide (Intermediate 7)- (3.3g, 82percent) was used in the next step without further purification. 1 H NMR (DMSO-d6, 500 MHz) delta ppm 9.9 (s, 1 H), 9.41 (t, 1 H), 8.07 (d, 1 H), 7.98 (d, 1 H), 7.53 (s, 1 H), 7.49-7.35 (m, 2H), 4.52 (d, 2H). LC/MS (Method 2) Rt = 1.73 min; detected mass: m/z = 360.12 ([M+H]+). | |
82% | Intermediate 7: <strong>[4565-31-5]5-formyl-thiophene-2-carboxylic acid</strong> 2,4-dichlorobenzylamide To a suspension of 5-Formyl- 2- thiophenecarboxylic acid (2 g, 12.81 mmol) in 50 ml dichloromethane at 0°C, 1 -Chlor-N,N,2-trimethylpropinylamin (1 .88 g, 14.1 mmol) was added. The mixture was stirred 5 min at 0°C and then was allowed to reach RT and stirred at this temperature for 15 min. To the obtained clear solution, a solution of 2,4- dichlorobenzylamine (2.5 g, 14.1 mmol) and triethylamine (19.2 mmol) in 10 ml dichloromethane were added and the reaction was stirred at RT overnight. The mixture was diluted with dichloromethane and washed with aqueous HCI (0.25 M). The organic layer was dried, filtered off and concentrated under reduced pressure. The obtained residue- 5-Formyl-thiophene-2-carboxylic acid 2,4-dichloro-benzylamide (Intermediate 7)- (3.3g, 82percent) was used in the next step without further purification. 1 H NMR (DMSO-d6, 500 MHz) delta ppm 9.9 (s, 1 H), 9.41 (t, 1 H), 8.07 (d, 1 H), 7.98 (d, 1 H), 7.53 (s, 1 H), 7.49-7.35 (m, 2H), 4.52 (d, 2H). LC/MS ( Method 2) Rt = 1 .73 min;detected mass: m/z = 360.12 ([M+H]+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; In dichloromethane; at 20℃; for 24h; | A mixture of <strong>[34622-39-4](S)-6-oxopiperidine-2-carboxylic acid</strong> (1.00 g, 6.99 mmol), 2,4-dichlorobenzylamine (1.48 g, 8.38 mmol) and 3-[(ethylimino)methylene]amino}-N,N-dimethylpropan-1-aminiumchloride (EDCI) (1.61 g, 8.38 mmol), in CH2Cl2 was stirred at r.t. for 24 h. Solvents were evaporated and the mixture was solved in EtOH (40 mL), then Et2O was added (60 mL). The desired product crystalized over night. It was filtered to give a white solid in 62percent yield (1.30 g, 4.32 mmol). mp (EtOH/Et2O) 142-144 °C; TLC Rf (CH2Cl2/MeOH: 96/4) 0.3; 1H NMR (DMSO[d6], 400 MHz): delta ppm 1.56-1.81(m, 3H, CH2CH2CH2CH), 1.86-1.96 (m, 1H, CH2CH2CH2CH), 2.15 (t, J=6.8 Hz, 2H, CH2CH2CH2CH), 3.95 (dd, J= 5.9, 3.0 Hz, 1H,CH2CH2CH2CH), 4.28 (dd, J = 15.8, 5.6 Hz, 1H, NHCH2), 4.37 (dd, J = 15.8, 5.6 Hz, 1H, NHCH2), 7.38 (d, J = 8.3 Hz, 1H, ArH), 7.42 (dd, J = 8.3, 2.1 Hz, 1H, ArH), 7.57 (br d, J = 2.5 Hz, 1H, NHCH), 7.60 (d,J= 2.1 Hz, 1H, ArH), 8.52 (br t, J = 5.8 Hz, 1H, NHCH2); 13C NMR(DMSO[d6],100 MHz): delta ppm 18.9 (CH2), 26.4 (CH2), 31.7 (CH2), 40.2 (CH2), 55.4 (CH), 127.7 (CH), 128.9 (CH), 130.6 (CH), 132.6 (C), 133.3 (C), 135.9 (C), 170.9 (CH), 172.7 (C). Anal. Calcd for C13H14Cl2N2O2: C, 51.85; H, 4.69; N, 9.30. Found: C, 51.82; H, 4.70; N, 9.29percent. |
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