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CAS No. : | 3522-07-4 | MDL No. : | MFCD09261132 |
Formula : | C8H8N2O | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | CYEQSOYROKGJDA-UHFFFAOYSA-N |
M.W : | 148.16 | Pubchem ID : | 12639202 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H332-H335 | Packing Group: | |
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 |
---|---|---|
59% | for 4 h; Reflux | Intermediate 42:[0174] A mixture of 2-fluoro-4-methoxybenzaldehyde (1 g, 6.5 mmol) and hydrazine (7 mL) was heated to reflux for 4 h. The mixture was extracted with CH2(3/4. The combined organic layers were washed with water, brine, concentrated in vacuo, and purified by column chromatography (elution with PE/EtOAc=5: l) to afford 6-methoxy-lH-indazole (intermediate 42) (568 mg, 59percent) as a yellow solid. HPLC: 99percent, RT 2.159 min. MS (ESI) m/z 149.1[M + H]+. |
55.5% | at 120℃; for 30 h; Sealed tube | Step A: 2-fluoro-4-methoxybenzaldehyde (6.5 g, 42.2 mmol) and 85percent hydrazine hydrate (50 mL) were sealed at 120 ° C.The tube was stirred for 30 hours. Water (50 mL) was added and extracted with ethyl acetate (50 mL×3).The combined organic phases were washed with water (20 mL x 2). Then water (100 mL) was added to the organic phase.The pH was adjusted to 1-2 with 2M hydrochloric acid and the layers were separated and the product was taken from aqueous. The aqueous phase was adjusted to pH 8-9 with a 2M aqueous sodium sulphate solution, then extracted with ethyl acetate (50mL×3) and dried over anhydrous sodium sulfate. Evaporate the solvent under reduced pressure.The product was recrystallized from methyl tert-butyl ether / petroleum ether to give 6-methoxy-1H-carbazole (31) (3.47 g).The yield was 55.5percent. |
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