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ChemicalBook CAS DataBase List 1H-Indole-7-carboxylic acid, 4-broMo-, Methyl ester

1H-Indole-7-carboxylic acid, 4-broMo-, Methyl ester synthesis

3synthesis methods
-

Yield: 45%

Reaction Conditions:

in tetrahydrofuran;ethanol at -70; for 1 h;Inert atmosphere;

Steps:

10.3 Step 3: Synthesis of compound 10-5
Add compound 10-4 (2.0 g, 7.72 mmol), tetrahydrofuran (20 mL), and replace with nitrogen into a three-necked flask.Cool to -70 in ethanol dry ice bath,Then add ethylmagnesium bromide (28mL, 1mol/L) dropwise,React at this temperature for 1h. The reaction was poured into a saturated ammonium chloride solution, extracted with ethyl acetate three times, the organic phases were combined, and silica gel was added to mix the sample, and then purified by a silica gel column to obtain 680 mg of product 10-5, with a yield of 45%.

References:

CN112608318, 2021, A Location in patent:Paragraph 0233-0234; 0239-0240

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