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CAS No. : | 39793-31-2 | MDL No. : | MFCD07368542 |
Formula : | C7H5NO2S | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | PMHDSACGRKBACK-UHFFFAOYSA-N |
M.W : | 167.19 | Pubchem ID : | 4961254 |
Synonyms : |
|
Chemical Name : | 4H-Thieno[3,2-b]pyrrole-5-carboxylic acid |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
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 |
---|---|---|
94% | With potassium hydrogencarbonate In N,N-dimethyl-formamide at 0 - 20℃; for 16 h; | 4H-Thieno-[3,2-b]pyrrole-5-carboxylic acid (3.00 g, 12.2 mmol) was dissolved in DMF (10 mL) and cooled to 0 00 in an ice bath. To this solution were added KHCO3 (1.32 g, 13.2 mmol) and iodomethane (1.5 mL, 24.1 mmol). The reaction was stirred for 16 hours at room temperature before addition of water (200 mL), causing the precipitation of a light-tan solid. The precipitate was isolated via vacuum filtration and washed with water. Dried in vacuum over phosphorus pentoxide to give the titled product as white solid (2.98 g, 94percent yield). 1H NMR (400 MHz, DMSO-d6:D20, 20:1) O 12.55 (br s, 1H), 7.64 (5, 1H), 7.19 (br s, 1H), 3.82 (5, 3H); 130 NMR (101 MHz, DMSO-d6:D20, 20:1) O 160.97, 139.80, 127.48, 126.47, 123.01, 108.35, 94.12, 51.58. |
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