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CAS No. : | 941-69-5 | MDL No. : | MFCD00005502 |
Formula : | C10H7NO2 | Boiling Point : | - |
Linear Structure Formula : | NC4H2O2(C6H5) | InChI Key : | HIDBROSJWZYGSZ-UHFFFAOYSA-N |
M.W : | 173.17 | Pubchem ID : | 13662 |
Synonyms : |
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Signal Word: | Danger | Class: | 6.1 |
Precautionary Statements: | P264-P270-P273-P301+P310+P330-P391-P405-P501 | UN#: | 2811 |
Hazard Statements: | H301-H400 | Packing Group: | Ⅲ |
GHS Pictogram: |
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* 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 |
---|---|---|
45% | With tert.-butylhydroperoxide; tetra-(n-butyl)ammonium iodide; In water; 1,2-dichloro-ethane; at 70℃; for 6h; | General procedure: To a screw cap reaction vial, maleimide (0.1 mmol, 1 equiv), tertiary aniline[1] (0.2 mmol, 2 equiv), tetrabutyl ammonium iodide 3.69 mg (TBAI, 10 mol%), TBHP 55 muL (70% in H2O, 0.4 mmol, 4 equiv) and DCE (1.0 mL) were added. The reaction mixture was heated to 70 C. The reaction progress was monitored by thin layer chromatography (ethyl acetate/petroleum ether mixture) and GC-MS. Upon completion, the crude reaction mixture was concentrated under reduced pressure and subsequently purified by flash column chromatography over silica gel using petroleum ether/ethyl acetate as eluent system. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In ethanol; at 20℃; for 31h;Reflux; | The stirred mixture of N-(4-methoxyphenyl)thiourea (1b, 182 mg, 1 mmol) and Nphenylmaleimide (2a, 260 mg, 1.5 mmol) in EtOH (5 mL) was refluxed for 7 h, then stirred at rt for 24 h. Then it was poured into water (40 mL), the formed precipitate collected byfiltration, washed with water and recrystallized from iPrOH. Colorless crystals, yield 230 mg (65%), mp 208-209 C (dec.). According to 1H NMR spectrum, amide 3f exists as tautomeric mixture of 2-(2-(4-methoxyphenyl)imino-4-oxo-1,3-thiazolidin-5-yl)-N-phenylacetamide (3fI) and 2-(2-(4-methoxyphenyl)amino-4-oxo-4,5-dihydro-1,3-thiazol-5-yl)-N-phenylacetamide(3f-A) in a 1:1 ratio.1 NMR (400 Hz, DMSO-d6): δ = 2.75-2.87 (m, 2 , Ha); 3.21-3.33 (m, 2 , Hb); 3.74 (s, 3 H, OCH3); 3.75 (s, 3 H, OCH3); 4.44-4.48 (m, 2 , 2 SCH); 6.92-7.07 (m, 8 H, HAr); 7.26-7.32 (m, 4 H, 2 HmB); 7.53 (d, J = 7.9 Hz, 2 H, HoB); 7.57 (d, J = 7.9 Hz, 2 H, HoB); 7.61 (d, J= 9.0 Hz, 2 H, HoAof A); 10.10 (s, 1 H, PhBNH); 10.14 (s, 1 H, PhBNH); 11.04 (br s, 1 H, NH); 11.58 (br s, 1 H, NH) ppm. 13 NMR (100 Hz, DMSO-d6): δ = 39.2 (2); 39.7 (2); 50.1 (SCH); 55.2 (CH3); 55.3 (CH3); 114.1 (CmA); 114.5 (CmA); 119.07 (CoB); 119.10 (CoB); 122.0 (CoA); 123.4 (CpB); 123.6(br s, CoA); 128.7 (CmB); 131.9 (CiA); 138.7 (CiB); 138.8 (CiB); 156.3 (CpA); 156.8 (CpA); 168.1 (PhBNHC=O); 168.6 (PhBNHC=O); 177.1 (C=O); 189.2 (C=O) ppm. Other carbon signals cannot be clearly detected.HRMS (ESI), m/z: calcd for C18H17N3O3S [M+H]+356.1063, found 356.1077. |
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