Adding a certain compound to certain chemical reactions, such as: 247564-59-6, name is 5,7-Difluoroindolin-2-one, belongs to indolines-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 247564-59-6, Product Details of 247564-59-6
Step 1:; 5,7-Difluorooxindole (prepared in a manner analogous to Example 62, steps 1-4 using 2,4,6-trifluoronitrobenzene instead of 2,6-difluoronitrobenzene) (0.64 g, 3.2 mmol) was dissolved in N,N-dimethylformamide (3 mL) and sodium hydride (0.24 g, 6.4 mmol, 60% wt suspension in mineral oil) was added in portions over 15 minutes and the mixture was stirred an additional 30 minutes. In a separate flask, [(2R,3R)-3-(3-fluorophenyl)oxiran-2-yl]methanol (1.08 g, 6.4 mmol, from Example 25 Step 3) was dissolved in N,N-dimethylformamide (3 mL) and titanium isopropoxide (1.89 mL, 6.4 mmol) was added and the mixture was stirred 30 minutes. The titanium isopropoxide/epoxide solution was then added to the solution of oxindole sodium salt dropwise and the mixture was stirred at room temperature for 24 hours. The mixture was then carefully quenched with 2 N aqueous hydrochloric acid and diluted with 200 mL of 2 N aqueous hydrochloric acid (use of hydrochloric acid is essential to prevent precipitation of titanium salts and subsequent emulsification). The mixture was extracted with ethyl acetate, the organic layers combined, washed with water, and saturated brine, dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure. The crude product was purified via Isco chromatography (Redisep, silica, gradient 20% to 100% ethyl acetate in hexane) to afford 1.02 g (87%) of 5,7-difluoro-1-[(1S,2S)-1-(3-fluorophenyl)-2,3-dihydroxypropyl]-3,3-dimethyl-1,3-dihydro-2H-indol-2-one as a sticky oil. MS (ES) m/z 365.12 (M+).
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Reference:
Patent; Wyeth; US2007/72897; (2007); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem