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CAS No. : | 61700-61-6 | MDL No. : | MFCD06804570 |
Formula : | C8H6N2O2 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | MAVGBUDLHOOROM-UHFFFAOYSA-N |
M.W : | 162.15 | Pubchem ID : | 4248454 |
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 |
---|---|---|
93% | With 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; In methanol; at 20℃; | A solution of the respective 1H-indazole-5-carboxylic acid or 1-alkyl-1H-indazole-5-carboxylic acid (1 or 7, 10, 1.0 mmol), 3,4-dichaloaniline or <strong>[98121-41-6]5,6-dichloropyridin-3-amine</strong> (-5 or 6,1.1-1.2 mmol), N-ethyl-N-(3-dimethylaminopropyl)carbodiimidehydrochloride (EDC-HCl, 1.0-1.2 mmol) in methanol (5.0 mL) wasstirred over night at room temperature. The reaction was thenpoured into water (10 mL), stirred for 30 min at room temperature,filtered, washed with water (3 x 10 mL), and then dried at 70 C.The crude product was purified by column chromatography onsilica gel (mobile phase: dichloromethane/MeOH 9/1 v/v) following by recrystallization from petroleum ether/dichloromethane. 4.1.2.1. N-(5,6-dichloropyridin-3-yl)-1H-indazole-5-carboxamide(14). Off-white-greyish solid (125 mg, 93%); mp > 290 C (dec.). 1HNMR (500 MHz, DMSO-d6) delta 7.67 (d, J 8.82 Hz, 1H, Ph), 8.05 (d,J 8.51 Hz, 1H, Ph), 8.21 (s, 1H, Ind.-Het.), 8.34 (s, 1H, Pyr.), 8.44 (s,1H, Ph), 8.74 (s, 1H, Pyr), 12.8 (s, 1H, CONH), 13.55 (s, 1H, NH). 13CNMR (125 MHz, DMSO-d6) delta 110.1, 111.1, 120.5, 123.0, 123.2, 123.9,126.3, 126.7, 127.1, 135.3, 136.1, 141.4, 163.1. ESI-MS (m/z): calcd. forC13H8Cl2N4O: 306.008; found 305.121 [M H]e, 307.301 [M H]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
84% | With iodine; potassium hydroxide; In N,N-dimethyl-formamide; at 25℃; for 3h; | Into a 25-mL round-bottom flask was placed 1 H-indazole-5-carboxylic acid (200 mg, 1.23 mmol), Nu,Nu-dimethylformamide (3 ml_), potassium hydroxide (138 mg, 2.46 mmol) and iodine (470 mg, 1.85 mmol). The solution was stirred for 3 h at 25C. The reaction was quenched by the addition of 10 mL of Na2S203. The pH value of the solution was adjusted to 6 with hydrogen chloride solution (10 %). The solids were collected by filtration. This resulted in 300 mg (84%) of 3-iodo-1 H-indazole-5-carboxylic acid as a white solid |
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