Indolone derivative, medicinal composition thereof and preparation method and application of indolone derivative
A compound and hydrate technology, applied in the field of medicine and chemical industry, can solve problems such as difficult large-scale production, complex molecular structure, and difficult chemical synthesis
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preparation example 1
[0069] Preparation Example 1: Synthesis of 2-benzoyl-pyrrole
[0070] Under the protection of nitrogen, 3.00g (44.7mmol) pyrrole was dissolved in 60mL ether, 5.86g (90.1mmol) zinc powder was added under stirring at 0°C, and 5.67g (40.3mmol) benzoyl chloride was slowly added dropwise, and the reaction was completed for 1 hr. After filtration, concentration, and silica gel column chromatography, 4.00 g of a yellow-white solid was obtained, with a yield of 58.0%. 1 H-NMR (400MHz, DMSO-d6) δppm: 12.08 (brs, 1H), 7.81-7.79 (m, 2H), 7.63-7.59 (m, 1H), 7.55-7.51 (m, 2H), 7.23-7.21 ( m, 1H), 6.78-6.77 (m, 1H), 6.27-6.26 (m, 1H).
preparation example 2
[0071] Preparation Example 2: Synthesis of 2-propionyl-pyrrole
[0072] Synthesized with reference to the method of Preparation Example 1 to obtain a white solid with a yield of 61.0%. 1 H-NMR (400MHz, DMSO-d6) δppm: 11.76 (br s, 1H), 7.06-7.04 (m, 1H), 6.97-6.95 (m, 1H), 6.16-6.18 (m, 1H), 2.72-2.89 (q, 2H, J=7Hz), 1.08-1.04 (t, 3H, J=7Hz).
preparation example 3
[0073] Preparation 3: 3,5-Dimethyl-1H-pyrrole-2,4-dicarboxylic acid-2-tert-butyl-4-ethyl ester synthesis
[0074] Under cooling in an ice-water bath, dissolve 8.35g (52.8mmol) of tert-butyl acetoacetate in 15mL of glacial acetic acid, and add dropwise an aqueous solution of sodium nitrite (4.50g of sodium nitrite in 10mL of water) while stirring. over 10°C. After dropping, stir at room temperature for 3 hrs to obtain a light yellow transparent solution, which is set aside for use.
[0075] Dissolve 5.87g (45.1mmol) of ethyl acetoacetate in 20mL of glacial acetic acid and heat to 65°C. Slowly add the light yellow transparent solution prepared above dropwise, and add 10.37g of zinc powder in 5 times. The process is exothermic, and the temperature control does not exceed 80°C. After the addition was complete, the temperature was raised to 75° C. for 1 hr. After cooling to room temperature, a white solid precipitated and was filtered. Petroleum ether was recrystallized to...
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