Adding a certain compound to certain chemical reactions, such as: 324-03-8, name is 6-Fluoroindoline-2,3-dione, 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 324-03-8, Quality Control of 6-Fluoroindoline-2,3-dione
General procedure: Similar to as described in General Procedure Z, 6-fluoro-2,3-dihydro- 1H-indole-2,3-dione was converted to the title compound as a yellow solid (ig, 15%). LC-MS (ES, iWz): 195 [M+H]; A solution of 2,3-dihydro-1H-indole-2,3-dione (1 eq.) and sodium hydroxide (1.1 eq.) in water was stirred for 5-30 mm at 25 C. Then a solution of sodium nitrite (1 1 eq.) in water and concentrated sulfuric acid (2 eq.) were added dropwise with stirring at 0.-10 C. After 5-30 mm a solution of SnC12 (2.5 eq.) in concentrated hydrochloric acid (15-30 eq.) was added slowly. After5 being stirred for 1–5 h at 25 C the reaction mixture was filtered and the solid was dissolved in methanol. Sulfuric acid (0.5-1 eq.) was added to the solution and the solution was heated to reflux overnight. The resulting mixture was concentrated under vacuum, diluted with water, extracted with ethyl acetate, dried over anhydrous sodium sulfate, and concentrated under vacuum to give the ester which may need further purification such as fresh chromatography.
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Reference:
Patent; F. HOFFMANN-LA ROCHE AG; GENENTECH, INC.; BLAQUIERE, Nicole; BURCH, Jason; CASTANEDO, Georgette; FENG, Jianwen A.; HU, Baihua; STABEN, Steven; WU, Guosheng; YUEN, Po-wai; WO2015/25025; (2015); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem